SKU: 36662437862

Flowtech LS Swap Exhaust Manifolds - 31730-1FLT

Sale price$149.82 Regular price$166.47
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

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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: 36662437862

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4.3 ★★★★★
Based on 8 reviews
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A
Verified Purchase
Alicia C. Robinson
Bozeman, US
★★★★★ 5
Recommended
Size: Medium, Color: Black
Great fit and great quality. I do recommend this product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 10, 2026
A
Verified Purchase
Acrowbat
Port Orchard, US
★★★★★ 5
Suprisingly good quality and a great looking jacket
I have been searching for a ring master jacket for a circus themed gala where I will be the Auctioneer/Ring Master. All the other jackets I looked at were either cheap costume stuff or just looked a little too much military Hussar style with all of the added gold tassels. This has just the right class and definitely the right look. I was worried it would fit weird or just not be constructed well but I could not be any happier with this jacket- the sleeves are a perfect length when my arms hang at my side, as is the high waist cut and the length of the tails are also just right- and best of all the sequins really shine. I spent my career in the circus and the performing arts and this would have been more than acceptable on stage for someone to wear as a ring master or to look fancy and sparkly, assuming nobody will be standing on your shoulders and popping off your sequins. It is comfortable to wear, although I would not say it allows for full range of motion relative to a costume I would have actually worn in a circus while doing acrobatics. But that would be a totally hand made costume with flexible material and 4-10x the price. Overall it cannot be beat for your average wearer!
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Reviewed in the United States on January 9, 2023
E
Verified Purchase
Everett O'Keefe
West Palm Beach, US
★★★★★ 5
Order big!
Flashy and fun. Runs small so order big!
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Reviewed in the United States on January 21, 2026
J
Verified Purchase
JMcAfreak
Lowell, US
★★★★★ 4
Well Made, Runs A Little Small
I bought this on short notice for a drag show. I wasn't expecting a whole lot, but it exceeded my expectations in a lot of ways. The interior feels like the inside of a standard suit coat, and is comfortable for long term wear. The sequins are sewn on in a pattern, and there's little, if any, fallout. I've only found a couple sequins on the floor. I've used it a lot since the drag show, for a lot of things (live streams, videos, etc). Absolutely worth the price, and I've already gotten my money's worth out of it. It does run a little small, but it still mostly fits according to the size chart. A few notes: - It doesn't have button holes, so if you're looking for something that buttons up, look elsewhere. - Washing instructions say to machine wash cool, warm iron (do not tumble dry, do not dry clean). I'd say run it on the gentlest cycle you can muster, or just spot clean stains and the pits (if you're sweaty). I don't know how well this thing would survive a wash, but I haven't needed to wash it yet.
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Reviewed in the United States on June 12, 2021
C
Verified Purchase
Callie Brant
Battle Creek, US
★★★★★ 5
Thrilled With Purchase
Size: 3X-Large, Color: Gold
Perfect, not too heavy, perfect for a Columbia costume!
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Reviewed in the United States on October 9, 2025

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