SKU: 45725917219

Yoshimura - RS-4 Full System (Suzuki)

Sale price$280.78 Regular price$311.98
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

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Description

Yoshimura - RS-4 Full System (Suzuki)Yoshimura RS 4 Signature Series Full System (Suzuki) Built straight from Yoshimuras racing pedigree, the RS 4 Signature Series Full System gives Suzuki riders that factory level performance, sound, and style. Designed to pull harder out of the gate and add torque throughout the rev range, the RS 4 helps your RM Z450 launch strong, hook up clean, and pull longer down the straight. Its a complete system engineered to win lighter than stock, smoother

Yoshimura - RS-4 Signature Series Full System (Suzuki)

Built straight from Yoshimura’s racing pedigree, the RS-4 Signature Series Full System gives Suzuki riders that factory-level performance, sound, and style. Designed to pull harder out of the gate and add torque throughout the rev range, the RS-4 helps your RM-Z450 launch strong, hook up clean, and pull longer down the straight. It’s a complete system engineered to win — lighter than stock, smoother through the midrange, and tuned for that deep Yoshimura growl that makes a four-stroke sound just right.

The RS-4’s pentagonal canister isn’t just for looks — it houses Yoshimura’s Polyresonant Duplex Chamber and stepped baffle design to control noise while boosting power. A stainless steel header and carbon fiber end cap give it a clean factory finish that can take real abuse. And if you want to cut even more weight, Yoshimura offers titanium versions that look as good as they perform.

Why We Like It:
You can feel the race DNA in this system. Throttle response snaps to life, the midrange torque feels meatier, and it still keeps sound levels smart and clean. The RS-4 gives your Suzuki that pro-level punch without making it harsh or high-maintenance — just smooth, reliable power that hits right when you need it.

Why It’ll Work for You:
This system transforms how your bike builds power — smoother off the bottom, stronger through the mid, and more drive when you twist it wide open. The Polyresonant Chamber controls sound without killing flow, while the stepped baffle helps your RM-Z pull harder through every gear. It’s a true race-bred setup that delivers consistent performance, lighter weight, and that unmistakable Yoshimura tone — refined, powerful, and ready for the gate.

 

Key Features:

  • Pentagonal-shaped muffler sleeve for unique factory styling

  • Front muffler cap functions as a Polyresonant Duplex Chamber to reduce noise

  • Two-stage stepped baffle for improved torque and throttle response

  • Carbon fiber end-cap with Yoshimura race design

  • Available in three configurations:

    • Stainless header / Aluminum can / Carbon End Cap

    • Titanium header / Titanium can / Carbon End Cap

    • Titanium header / Carbon can / Carbon End Cap

  • Lightweight design saves pounds over stock

  • Dyno- and race-tested for proven performance gains

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 45725917219

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4.4 ★★★★★
Based on 17 reviews
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A
Verified Purchase
Amazon Customer
Belleville, US
★★★★★ 5
Very good quality for a reasonable price.
Size: 10, Color: Grey
Very good quality, very soft, very comfortable, look amazing, I’m very happy.
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Reviewed in the United States on May 23, 2026
M
Verified Purchase
Mike L.
Chelsea, US
★★★★★ 4
Comfortable fit for slip-in fabric shoes
Size: 14, Color: Black/Black
My first experience with Marc Joseph. I typically purchase dress and casual work shoes from Florsheim and occasionally Rockport. I'm giving these four stars because the initial fit and feel appear solid. Depending on the shoe brand I wear a size 14 or 15. My feet are slightly wide but I don't alway need wide fit. These size 14 fit well with wide enough toe box. I've tried slip in shoes before and they just don't feel right. These somehow work and there is no heel slip. My only reservation is the high lip on the heel for slip-in and hope they dont catch pant hems. I gave 4 stars because I'll have to determine durability. Granted they are a light fabric shoe with a soft rubber tread. I'd like them to last for at least 6 months..and use them for business casual work wear during warm weather.
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Reviewed in the United States on May 19, 2026
C
Verified Purchase
Chris
Bozeman, US
★★★★★ 5
Stylish and comfortable.
Size: 8 Wide, Color: Black/Black
Shoes look great and fits well. Definitely recommend pocking another pair.
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Reviewed in the United States on May 10, 2026
M
Verified Purchase
Mike
Cuba, US
★★★★★ 3
Narrow for an 11.5W
Size: 11.5 Wide, Color: Navy
Nice look and material but very narrow for a wide, had to return
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Reviewed in the United States on February 25, 2026
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Verified Purchase
David Kuck
Omaha, US
★★★★★ 5
NIce Shoes
Size: 10, Color: Black
Very nice quality and comfort
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026

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