SKU: 3290507668

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 3 - Aug 8

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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: 3290507668

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4.5 ★★★★★
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Lady B
Cuba, US
★★★★★ 5
Best affordable squeaker toy
Color: Crinkle Chicken (Brown), Size: Large, Color: Crinkle Chicken (Brown), Size: Large
my dog is obsessed with this toy, this has became his new comfort toy and after having this for about four months the legs are falling off but it’s very durable. The squeaker also moved from the head of the chicken to the body of the chicken but that’s after it was played with every single day. I love that it has two squeakers and it’s the perfect toy for my dog.
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Reviewed in the United States on May 6, 2026
S
Verified Purchase
Sara Salazar
Phoenix, US
★★★★★ 5
Beautiful design, perfect quality for seasoned destroyers.
Color: Crinkle Duck (Yellow), Size: Large
Absolutely adorable, excellent quality, I have a couple of monsters whose teeth make any kong toy tremble, I was very concerned whether something as soft and nice would last. So far so good. Good looking and soft and tough at the same time!.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
M
Verified Purchase
MADDY
Pawtucket, US
★★★★★ 5
Best fun indestructible toy
Color: Crinkle Duck (Yellow), Size: Large
Truly indestructible no matter how much our oittie tries. She has owned it for three months works at destroying every day with no success. She carries it everywhere. Best purchase for chewer, more fun than the popular rubber heavy duty toy. Do not hesitate your pup will thank you for this fun distraction.
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Reviewed in the United States on May 30, 2026
D
Verified Purchase
DEBORAH C. JONES
Battle Creek, US
★★★★★ 4
Happy with quality & price
Color: Crinkle Duck (Yellow), Size: Large
Lasts longer than most toys for the price Only bought Kong or Outward Hound for my 17 lb Lhasa Apso in the past a
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Reviewed in the United States on May 30, 2026
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Verified Purchase
Evelyne Parkin
Waukegan, US
★★★★★ 5
My puppy tore it up in about 5min. She had a ball while it lasted.
Color: Crinkle Duck (Yellow), Size: Large
Cute, not durable
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026

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