SKU: 99208860340

Flowtech LS Swap Exhaust Manifolds - 31730-3FLT

Sale price$172.32 Regular price$191.47
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 19 - Aug 24

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Description

Flowtech LS Swap Exhaust Manifolds - 31730-3FLTOverview: 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 Black Ceramic
Header Finish Black 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: 99208860340

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4.9 ★★★★★
Based on 16 reviews
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Please J man
West Palm Beach, US
★★★★★ 5
Worth every dollar
Color: Black, Size: 48"L x 5.5"W
This cable gutter is pure genius. You can unhook it and drop it down to access all your cables and everything, strap it all in nice and neat, and hang it back up. Super easy to wire up for a "permanent" set up, yet super easy to modify at any time. It makes the desk look SO CLEAN, and take way less effort. No zip ties, no nothing. My favorite part was it came with these awesome little velcro zip ties, so they are easy to undo and re-use. Worth every dollar.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 7, 2025
J
Verified Purchase
Jaret
Lake Worth, US
★★★★★ 4
Quick and easy
Color: Black, Size: 36"L x 5.5"W
Simple and quick fix for a lot of wires, looks good and is perfect if you like to hide your wires and forget about them. I recommend buying other cable management accessories if you want to really organize your cables, as this only comes with a few velcro fasteners. It’s also a little bit awkward getting it on and off the desk once you’ve already got the cables in it, so adding/removing cables is a little bit annoying.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 3, 2026
J
Verified Purchase
Jess
Pawtucket, US
★★★★★ 5
beginner friendly cord managing 10/10
Color: White, Size: 36"L x 5.5"W, Color: White, Size: 36"L x 5.5"W
Love how easy it was to set up and get to working on the new desk setup in my room. This made my setup 10x better and more efficient for me and my tiny fur buddies. Holds plenty of cords and is super easy to keep secured on the desk. 10/10 for me. I can tell it’ll last a while. I’m not a pro and the cable managing could be better but this helped a ton.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
T
Verified Purchase
Tim Johnson
Draper, US
★★★★★ 5
Worth the price!
Color: Black, Size: 36"L x 5.5"W
Great product and easy to install. I purchased the 36 inch version and it’s just the right size for my desk. Makes securing and hiding the wires a breeze.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
J
Verified Purchase
JJ
West Palm Beach, US
★★★★★ 5
The best way to manage your cables.
Color: White, Size: 36"L x 5.5"W
Best cable management product I have used. period. I have used hanging baskets, tried 3m taping channels and tucking everything away. While that works. I change my setup fairly regularly. So hours spent to keep the cables perfectly managed just have to be redone when you add something or take something away. I love the design. The canvas has velcro stitched into it so you can strap heavier items like power strips and bricks into the canvas and then just run your cables through the channel. When you close the canvas all the cables are out of sight leaving something that looks clean but is also versatile enough to support and evolving setup. After everything I have tried, this has been the best hands down.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026

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