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Description
Aftermarket Assassins 2020-Up RZR Pro XP/Turbo R Stage 3 Lock & Load Kit **3-5 Day Lead Time**Kit fits all Pro XP Turbo R models 2 & 4 Seat 2020 2023 *Note 2021 23 models do not need the pre airbox intake tube, so the price is cheaper because of this* Lock & Load! This Stage 3 kit provides a big increase in horsepower and torque simplified into an easy package. Tuning, clutching and exhaust on the PXP go together like high powered rifles and tannerite. Together they pack a huge punch for the ultimate power gains to the wheels. The tuning
- Kit fits all Pro XP/Turbo R models 2 & 4 Seat 2020-2023
- *Note 2021-23 models do not need the pre-airbox intake tube, so the price is cheaper because of this*
- Lock & Load! This Stage 3 kit provides a big increase in horsepower and torque simplified into an easy package. Tuning, clutching and exhaust on the PXP go together like high powered rifles and tannerite. Together they pack a huge punch for the ultimate power gains to the wheels. The tuning allows for great power depending on the level tune, supporting mods & fuel you want to run. We change boost, timing and hundreds of parameters to deliver safe, yet big horsepower gains. The exhaust greatly reduces back pressure so we can run more boost, and that boost delivers more power. The clutching then transfers that power and turns it into wheel power instead of simply just turning it into RPM. To make sure your airflow is not cut off, we also include our pre airbox intake tube. Since the stock BOV is weak, we include our high quality billet one in this kit as well. The charge tube is also known to blow out on Level 3 or higher, so our high flow one is included. Lastly, our high flow after airbox intake tube is included and available in 2 versions. First is the standard version (great for Level 1-3), then we have the catch can version (suggested for Level 4-6). This kit is normally best paired with any level tune, especially if you upgrade to get the catch can.
- 2020 Kit Includes: PV3 Tuner, S3 Clutch Kit, Butter Shift Washers, Clutch Limiter, Pre-Airbox Intake Tube, Billet BOV, Exhaust, Charge Tube, Post-Airbox Intake Tube (or Intake Tube with Catch Can), Iridium Spark Plugs Pre-Gapped
- 2021-23 Kit Includes: PV3 Tuner, S3 Clutch Kit, Butter Shift Washers, Clutch Limiter, Billet BOV, Exhaust, Charge Tube, Post-Airbox Intake Tube (or Intake Tube with Catch Can), Iridium Spark Plugs Pre-Gapped
- Clutch kit includes setup guideline that lets you know how to setup your weights for tire size & tune level (Works with 29" - 35" Tires)
- If needing extra shims to align your clutch properly, we recommend our P90X Secondary Clutch Alignment Shim Kit.
- We highly suggest reading this article on the P90X clutch system to make your decision about clutching: https://aftermarketassassins.com/tech-blog/f/2020-rzr-pro-xp-clutch-issues#
- Optional to upgrade to our HD primary clutch. If upgrading to the HD primary clutch, you will need the P90X clutch puller to pull your OEM clutch.
- If sticking with the OEM primary clutch, we highly suggest our optional Revolver Tower Lock Cover
- Kit includes iridium spark plugs (Not pictured in 2020 kit) as the Pro XP models have had issues with low power/bad plugs. A fresh set of plugs and longer lasting iridium plugs have been the cure.
- Quicker throttle response and power delivery
- Throttle by wire limiters disabled
- Fan on/off at 185 degrees Fahrenheit (Stock is 190). The fan also ramps up in power quicker to keep you running cool.
- Optional start in any gear! Does not need to be in park to start. Will start without brake, but may throw a code. Press brake to start until we figure this issue out. Keep in mind this is removing a safety feature.
- Seat belt limiter disabled
- Speed limiter removed in low and high gears
- More throttle % and boost in low gear and reverse
- Rev limit at a safe 9300 RPM
- See how to install and use the tuner in this VIDEO
- No mess of having to send in your ECU & this device is a much safer way of programming. Simply plug in to your Diagnostic port, click tune, wait, and go ride!
- Very easy to use tuner that can also check and erase most trouble codes
- Easily data log 32 parameters with 1 push of a button and review on your windows computer later
- Tuner is updated with the latest firmware to make sure you have a smooth tuning process
- 1 Tune (along with your stock tune) are included in the initial price. Additional tunes are $50 each. We highly recommend 2 tunes so if poor fuel quality is an issue you can switch to a lower HP level.
- For reference; a Stock machine will dyno at 156-158 RWHP, 181 crank HP per factory
- Tune levels 1-4 are developed on the stock wastegate setting with stock injectors. Tunes 5 & 6 are only available with our 1200cc injectors & require adjusting your wastegate rod. We also offer all tune Levels 1 through 6 designed for the 1200cc injectors & WG rod adjustment.
- The Level 1 tune is a modified stock power level tune but has better boost maps to help keep you in the power. We disable many limiters, raise the speed limit, rev limit, and make necessary fuel & timing changes. We maintain the max factory boost of 16.5-17 PSI.
- The Level 2 tune offers 17.5-18 PSI of boost with a 10-12 RWHP gain. This tune rips and can be used on a bone stock RZR in most cases. We highly recommend our billet blow-off/diverter valve and pre airbox intake tube. While not required, clutching helps transfer the power to the wheels much more efficiently. This tune can also be used with exhaust, charge tube, and intake tube.... etc. No wastegate adjustment required. 91-93 Octane tune.
- The Level 3 tune is a game changer! Hitting hard with a gain of 20-25 RWHP, this tune offers the highest boost possible (18.5-19 PSI) on 91-93 octane fuel. Due to the upgraded Pro XP turbo with higher exhaust flow and more efficient compressor housing, we can get away with higher boost on pump gas. These are absolutely huge power gains that will have you grinning from ear to ear. This tune is built to be a max tune on 91-93 octane. If you only have access to 91 octane and fuel quality is poor or you'll be running really hard that day, we'd suggest using a small amount of race gas or octane boost to bump your octane. This helps prevent engine knock which causes the ECU to retard your timing curve resulting in a slight power loss. Required Mods: High flow pre airbox intake tube, exhaust, Billet BOV, S3 Clutch Kit. Suggested Mod: Charge Tube as we have seen them fail on this level. No wastegate adjustment required.
- Level 4 - Beast mode - 200 RWHP! This tune is designed for 98-100 octane (will run on UTV 96, or most fuels up to 110 octane) and was developed using one can of VP Octanium to a tank of fuel. Mixing other race fuel with the tune to get 100 octane output would work great, just keep in mind consistently using leaded fuels can result in premature failure of O2 sensors. Now for the fun part.... this tune is INSANE and brings your Pro XP to a new level at 197-200 RWHP on our dyno. This tune gains 40-43 RWHP and pushes the boost level to 23-24 PSI peak before settling at 22-23 PSI. Keep in mind the Power Vision boost only reads to 22-23 PSI (depending on your altitude) so it will be close to maxing out the gauge. The ECU still has vision above that, but you won't be able to read it without a manual gauge. Required Mods: High flow pre airbox intake tube, exhaust, Charge Tube, Billet BOV, S3 Clutch Kit. Suggested mod: After airbox intake tube WITH catch can, torque head bolts tighter with 120 degrees more rotation. No wastegate adjustment required.
- Level 5 1200cc Injectors, Waste Gate Rod Shortened - Beast mode times x2 - 210 RWHP! This tune is designed for 108-110 octane Now for the fun part.... this tune is INSANE and brings your Pro XP to a new level at 210 RWHP on our dyno. This tune gains 50-55 RWHP and pushes the boost level to 24-25 PSI peak, then settles to 23-24 PSI. Keep in mind the Powervision boost only reads to 22-23 PSI (depending on your altitude) so it will be close to maxing out the gauge. The ECU still has vision above that, but you won't see it without a manual gauge. There are a few other problems with this tune.... the speedometer struggles to keep up with the wicked acceleration and the tires won't stop burning off! Required Mods: High flow pre airbox intake tube, exhaust, Intake tube with catch can, Charge Tube, Billet BOV, S3 Clutch Kit. This requires shortening your wastegate rod as short as possible to 6.5-7 PSI crack pressure. Also requires torqueing head bolts tighter with 120 degrees more rotation.
- Level 6 1200cc Injectors, Waste Gate Rod Shortened - Beast mode x3 - 215 RWHP! This tune is designed for E-85 fuel. Now for the fun part.... this tune is simply stupid and brings your Pro XP to a new level at 215 RWHP on our dyno. This tune gains 55-60 RWHP and pushes the boost level to 24-25 PSI peak then settles to 23-24 PSI. Keep in mind the Powervision boost only reads to 22-23 PSI (depending on your altitude) so it will be close to maxing out the gauge. The ECU still has vision above that, but you won't see it without a manual gauge. There are a few other problems with this tune.... the speedometer struggles to keep up with the wicked acceleration and the tires won't stop burning off! Required Mods: High flow pre airbox intake tube, exhaust, Intake tube with catch can, Charge Tube, Billet BOV, S3 Clutch Kit. This requires shortening your wastegate rod as short as possible to 6.5-7 PSI crack pressure. Also requires torqueing head bolts tighter with 120 degrees more rotation.
- Max boost levels are listed as reference only. Altitude, temperature, charge temps, intercooler temps and many other conditions play into a factor of final boost output. AA tunes do a better job of making sure you reach these levels as the factory tunes are overly safe.
- Why AA tunes over others? We have been tuning UTV's with CVT clutches for a long time, longer than almost anyone in our field going back to the 800 RZR. Tuning a CVT vehicle properly is not an easy task as you have so many variables at one time. We spend the time to wheel dyno(with actual UTV tires) correctly per modification, and have advanced ECU calibration and clutching knowledge to do so. Every change in horsepower can result in us changing clutching several times. We also develop most of our supporting mods so we know everything works correctly, and build parts to fit the vehicles needs. Lastly and honestly the most important; we then back up our results with real world data logging on local trails and our facility on 110 acres. It's this combination that truly makes the difference and why AA normally has a faster vehicle with the same or less rated tune horsepower.
- High Load Helix 107-1042 or 107-1062: Slightly less aggressive than the performance helix with good acceleration gains/power transfer over the OEM helix. Designed to work better for heavier vehicles, heavier tires, heavy sand load or crawling type riding in mind. Works on Pro XP 2 seat 30-35" Dirt Tires, 30-32" dune paddles. Works on Pro XP 4 seat with 30-35" dirt tires, 28-32" dune paddles. Works on Turbo R 2 & 4 seat models with 32-35" tires or 30-33" paddles. Excellent all around helix for any Pro XP or Turbo R!
- Performance Helix 1043 or 1065: Aggressive helix with acceleration/higher horsepower/aggressive fast pace drivers in mind. Works best with a tuned vehicle. Works on Pro XP 2 seat 30-32" Dirt Tires, 30-32" dune paddles. Works on Pro XP 4 seat with 30-31" dirt tires, 28-30" dune paddles. Works on Turbo R 2 seat models with 32-33" Tires. Not suggested for Turbo R 4 seat models.
- If you have any other needs in these tunes, or any concerns; please e-mail!
- Oh... and get ready for your RZR to flat out rip!
Free Shipping to the Lower 48
jds 1/27/23
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4.1 ★★★★★
Based on 2168 reviews
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Product Reviews
★★★★★ 4
4 Stars for Now!
Format: Kindle
I DEVOURED this book. I was in a huge slump after reading a horrible series right before this but after 3 pages of this book, I was hooked. I read the whole book in 2 days. I think the author did an amazing job at writing an engaging story with an amazing twist at the end. I know many readers feel betrayed by the twist and find the narrator to be unreliable but I feel that the twist was done in a great unsuspecting way. Though I do feel betrayed, I think there is so much room for redemption in the second book!
The author also did an amazing job at world/character building. She was able to do so without interrupting the story which is one of my huge pet peeves. A lot of authors build by taking breaks in the plot or dialogue which I find choppy and disengaging but this author was able to build in an engaging way. There was some lack of world/character building but I think that was due to keeping reader in the dark. The world, politics, and characters were all very easy to understand.
I found the romance a little lackluster and a bit off-kilter. Some of it was really pushy and rushed which left a bad taste in my mouth. I do hope the author delves deeper into the romance in coming books.
The FMC was a breath of fresh air. She was not whiny or stuck-up like most books. She was never afraid to accept help from others but she was still able to shine with her intelligence. Not once did I think she made a poor decision just for the sake of a plot point. She was really easy to like. The MMC could use some work but I think that will happen more in coming books.
This is a MUST read, my only advice would be to wait until it is a finished series!
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Reviewed in the United States on July 30, 2025
★★★★★ 5
Need book 2 please :-)
Format: Kindle
From the very first chapter, Metal Slinger hooked me and refused to let go.
Set in a brutal, metal-bound world where power is carved from steel and survival depends on strength, strategy, and sheer will, this story follows a young woman forced into a dangerous system where control over metal isn’t just magic — it’s dominance, protection, and rebellion. When she’s pulled into escalating conflict and shifting alliances, she quickly learns that power always comes with a cost.
The magic system is sharp and immersive without being overwhelming. The way metal manipulation is woven into combat and politics makes every confrontation feel cinematic and high-stakes. It’s gritty, tense, and beautifully layered.
The Brynn, our FMC absolutely shines. She’s fierce but not untouchable, resilient without feeling unrealistic. Watching her navigate betrayal, survival, and the slow awakening of her own strength felt earned every step of the way. There’s grit in her fight scenes and vulnerability in her quieter moments that make her deeply human.
And the tension? Immaculate. The chemistry simmers under the surface before sparking into something electric. Every reluctant alliance, every charged interaction, every moment of “are they about to destroy each other or kiss?” had me flying through pages.
The pacing is relentless — no filler, no wasted scenes. Twists land hard. Stakes keep climbing. And that ending? Absolutely feral. The kind that leaves you staring at the wall for a minute before immediately checking when book two releases.
✨ Gritty metal-based magic
⚔️ High-stakes survival
🔥 Slow-burn tension
🖤 Fierce, layered heroine
💥 A finale that HITS (but cliffhanger!)
This is one of those fantasies that reminds you why you fell in love with the genre in the first place. If this is just Book One, I am more than ready to be emotionally wrecked again in the sequel.
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Reviewed in the United States on February 14, 2026
★★★★★ 5
Read this book! Then join our support group for the ending😜
While I’ve read some amazing books this year, it’s been awhile since I have completely devoured a book in less than 24 hours. This book was one I truly could not put down. I couldn’t fall asleep because I didn’t want to stop reading what happened next.
The way this book starts is one of my absolute favorite ways to fall into a story - with no preamble and immediate conspiring amongst characters.
Brynn has quickly become one of my new favorite FMCs. She is just so REAL. No whining or blaming her situation on everyone and everything else. She accepts her role in the world, but also holds a fierce determination to know the truth of that world. She is brave, yet terrified. Strong, yet self-conscious. She is cunning and intelligent and she doesn’t shy away from what is hard or allow emotion to overcome logic. I feel like she’s such a relatable character in everything that happens to her.
Then we have Kai…our commander and son of the leader. He’s got secrets. Big ones. And the amount of times my feelings for him flipped in this book is insane. I’m still honestly reeling…
Acker, my man…he’s mysterious, yet he doesn’t pull his punches. He’s loyal to a fault. He feels things deeply and he is fervent in his beliefs and desires. I adore him and yet want to shake him for the way he goes about making decisions and only sharing half truths. And right now my heart is aching for him and also terrified of him. When I say I need book 2 like I need water, that’s an understatement.
I don’t have space to discuss every side character, but just know that I love them deeply and they each have big personalities of their own.
The miscommunication honestly feels more like a necessity and less of a trope. The MCs don’t truly know one another, so of course there’s hesitancy to share everything with a stranger who has been somewhat forced upon you due to the situation you’ve both found yourself in. But it also is refreshing to watch them both learn to trust and communicate more and more as they go.
The world building was exciting and unique - unlike anything I’ve read before. The kingdoms and their systems and the unique magics all create this setting that is utterly perfect. I never felt confused, but could easily envision everything as it was explained in detail.
The slow burn and spice was paced so perfectly and realistically that it never felt weird or forced or annoying. It unfolds the way most normal relationships would (minus the magic and fantasy aspects). I truly cheered for our MCs and loved the way they finally came together.
This story takes all the tropes we know and love and twists them into something unique and entirely different than all the other stories we’ve grown used to. And when I tell you that you will NEVER see the plot twists coming, HOLY SMOKES BATMAN!
And the last 2 chapters took me ALL THE WAY OUT. I’m not sure how I’m supposed to be okay after that. I almost want to go back to chapter 55 and pretend the rest didn’t happen…but of course I can’t do that and now I’ll just be dying a little inside every day until I get my hands on book two!
If you enjoy fantasy or romantasy, this has to be your next read. All the rest can wait. Grab your copy YESTERDAY.
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Reviewed in the United States on June 24, 2025
★★★★★ 5
Outstanding book - A MUST READ
This is fantasy romance at its finest, and I couldn’t put it down from the moment I started. Packed with classic romantasy tropes that are done so well, especially my favorite: fated mates!
The world-building is both easy to digest and detailed enough to feel immersive. It strikes the perfect balance—not too vague but never overwhelming. The world is divided between several groups of people, and the story revolves around the Alaha, who live on the water, and the Kenta, who reside on land. For centuries, these two factions have maintained a fragile peace, but things take a sharp turn when our FMC, Brynn, threatens that peace right at the beginning of the book. What follows is a thrilling dive into a world of magic, rebellion, and secrets. I will say no more, because you should go into this book relatively blind to get the full experience.
Brynn, our FMC, is everything you could want in a lead. She’s smart, confident, and refuses to bow to threats. Then there’s the MMC, Acker. Scrumptious doesn’t even begin to cover it. The chemistry between him and Brynn is electric, and their dynamic had me grinning (and swooning) throughout.
This book has all the best romantasy tropes: forced proximity, slowest of slow burns, elemental magic, fated mates (done right), political intrigue, and plot twists you will not see coming! Each trope is executed masterfully, blending seamlessly into the story without feeling overdone. If these are your jam, you’ll absolutely love this book. Even if they are not usually your cup of tea, this book may change your mind.
While the pacing is fast and gripping overall, it does have a bit of a lull in the middle. That said, the ending more than made up for it—it left me gasping and desperate for the next book.
I think I said aloud, “What the hell just happened?” when I finished the last page. This book grabbed me by the neck and didn’t let go. It’s full of banter, twisty turns, and a delicious tension. Probably one of my favorite fantasy reads this year. I am going to be thinking about this book non-stop until book 2 is released!
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Reviewed in the United States on November 30, 2024
★★★★★ 4
Cool world building and great side characters
Format: Kindle
I adored the side characters and found them a lot more compelling than Jovie and Acker, if I’m being honest. I really wanted to like her but I found myself getting frustrated by her lack of, I don’t know, real rage for any of the crap people pull on her. Like ok I get this is romantasy but I have a hard time really believing you’re actually as upset at this guy as you claim to be when two minutes later you’re letting this dude shove his tongue down your throat. Additionally, an early running theme is that Jovie is frustrated that there are a bunch of people deciding things for her but the existence of the whole “matched/bond” thing makes much of her autonomy a moot point. Like at one point I think Acker even points out that them getting into bed together is a “foregone conclusion” and someone else mentions that the other matched pairs that don’t end up together ended up literally destroying each other. No pressure. I was a lot more interested in the characterization of Messer, Beau, and Hallis.
I knew I was going to be exasperated consistently by this girl when she let Mr. Murder Hottie treat Messer like a war criminal after he almost got himself spatchcocked for them by a mighty-morphing radical with an attitude problem. If my homie went through the battle blender like that for me after I found out he had been secretly protecting me and keeping me company for weeks/months, I would be doing A LOT MORE than standing around trying to figure out if I actually thought he was my friend while Captain Boy Toy did some light torture on him. Also Acker, my dude, if you can still find it in your heart and your loins to get riled up while your sister is having a breakdown in the room over…I don’t know, seek help I guess. I liked the juxtaposition of Beau’s bravado and her militaristic delivery of information to her brother showing she can turn on a dime when needed. Adding the mental toll her gift takes on her throughout time and how she has self destructive coping mechanisms really gave her some cool depth, and I appreciated the vulnerability it lent her. Hallis was a weird character for me at first but I ended up looking forward to his dialogue a lot. Initially, I didn’t care for the way he seemed to immediately just be a real jerk to Jovie and it didn’t often read as playful to me when I think it sometimes meant to. Regardless, his genuine care for Beau and Acker and how he dropped the act immediately when they really needed him made him pretty endearing and I always appreciate a grump who cares.
Honestly everything about this book was an A+ for me aside from the two main characters’ dynamic. When Jovie gets pissed at those bats and obliterates a forest? A+ When she tells Acker that she saw the signs that Messer was getting abused and acknowledged she felt shame and that she couldn’t fault him for being complicit in her mistreatment since she had done the same? A+ When she’s sitting there and coming to terms with the fact that everything she knows has been built on lies as she’s flipping through her sketchbook? A++ The writing and setting is great and the book is good, but someone needs to give Jovie a big stick and tell her it’s okay to be mad and smack people with it even if they’re hot.
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Reviewed in the United States on February 19, 2025