SKU: 3572181610

Flowtech LS Swap Exhaust Manifolds - 31730-1FLT

Sale price$149.82 Regular price$166.47
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 11 - Jul 16

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Flowtech LS Swap Exhaust Manifolds - 31730-1FLTOverview: These Flowtech cast iron exhaust manifolds have a 2. 25 inch outlet, natural cast finish and are designed to hug close to the engine block so they fit into a wide variety of replacement and engine swap applications at a budget friendly price. Being cast iron means they will provide years of leak free performance with less under hood noise than traditional headers. Plus, their shorty design means you can route exhaust tubing close to your

Overview:

These Flowtech cast iron exhaust manifolds have a 2.25 inch outlet, natural cast finish and are designed to hug close to the engine block so they fit into a wide variety of replacement and engine-swap applications at a budget friendly price. Being cast iron means they will provide years of leak-free performance with less under hood noise than traditional headers. Plus, their shorty design means you can route exhaust tubing close to your frame/floor pan for maximum ground clearance.

Features:

  • Intended for GM LS engine swap applications where durability and leak-free sealing is desired at a budget-oriented price
  • 304 stainless steel mating flanges included (mating flange fasteners are not included)
  • 2.25 inch outlet diameter offers improved flow for maximum performance from a cast iron exhaust manifold
  • 2 bolt exit flange configuration matches the E-rod exhaust manifolds for a factory like fitment. This allows the use of OE gaskets and fasteners if desired, for an OE quality seal and fitment to emissions devices
  • Cast from Hi-Silicon-Moly Ductile Iron to provide durability and corrosion resistance
  • Tight tuck design provides universal fit for most popular chassis and a clean traditional muscle car appearance
  • Available in plain as-cast finish or with black or silver ceramic coatings for reduced engine compartment temps and improved corrosion resistance

Application:

  • Universal

Specs:

Application Multi-fit
Brand Flowtech
Choose Your Part Manifold
Collector Diameter 2.25 inch
Emission Code 8
Engine GM LS
Finish Silver Ceramic
Header Finish Silver Ceramic
Header Style Manifold
Material Cast Iron
Primary Tube Dia. 1-3/4 inch
Product Type Manifold
Subframe Stock
Tube Material Cast Iron
Type of Component Manifold
Warning California Proposition 65
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: 3572181610

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Dupont Els
Waukegan, US
★★★★★ 5
Love it
Very happy with this product
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Reviewed in the United States on April 22, 2026
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Becca
Lexington, US
★★★★★ 4
Nice spray, don’t get in eyes
Don’t get in eyes, overall I like it though.
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Reviewed in the United States on April 9, 2026
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Cass
Fort Morgan, US
★★★★★ 5
Scent and application does not irritate my very sensitive lungs and skin
I am having excellent luck with this sunblock! I have sensitive skin and am extremely sensitive to some aerosol and scented products. This has not been an issue with me in any way. We do apply this outside for more ventilation. I have not used this on small children. This has primarily been tried by adults in my household. It’s super easy to apply, not oily, and so far is providing sun protection. I have not used this and then entered water. Our use has been for just everyday running around. It has not irritated anyone’s skin and no one has been burned by the sun- so gonna say it’s a win. This is very likely my new brand. I will update this review over the summer with how it holds up at the beach and pool. It’s doing a great job for basic outside recreation and play
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Reviewed in the United States on April 29, 2026
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sonofjohn
Chelsea, US
★★★★★ 5
Nice refreshing sunscreen
Great spray sunscreen. Don't even notice any difference between this organic sunscreen and regular sunscreen. It sprays nice and evenly and provides good protection for a reasonable time. I've used this during a number of workouts out in the sun, sweating, for a few hours at a time. It sprays pretty lightly on, and stays on. Once it sprays on, while it feels light, you do feel it (like a little sticky on your skin), same as any other sunscreen really though.
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Reviewed in the United States on April 30, 2026
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Crazyplantlady
Belleville, US
★★★★★ 5
Great summer scent, easy to apply, non greasy.
We LOVE spray on sunscreen. So much easier to apply, especially to yourself in the harder to reach areas. My kids like it better too, doesn't take as long so they can get to the fun stuff. This smells great, I love summer scents. It doesn't leave you feeling greasy or like you've just tarred and feathered yourself in cream and then sand. It's an SPF 50, so extra strong and does well at protecting. I do wish it was a little cheaper, so I watch for it go on sale and stock up.
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Reviewed in the United States on April 18, 2026

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