SKU: 3572181610

Flowtech LS Swap Exhaust Manifolds - 31730-1FLT

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

Ships within 48 hours · Estimated delivery Jul 13 - Jul 18

Promo Codes Available:

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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Whitings
Draper, US
★★★★★ 5
Adorable special occasion suit for boys
Size: 5, Color: Light Blue, Size: 5, Color: Light Blue
I ordered this 3-piece suit for my son and even though it’s currently a little too big for him, I couldn’t resist keeping it because it’s absolutely adorable! The quality really impressed me right out of the package. The fabric feels lightweight and breathable, which will be perfect for warmer weather, and it has a nice polished look without feeling stiff. The set comes with a blazer, vest, and pants, and each piece is very well made. I love the little details like the lapel on the jacket, the adjustable strap on the vest, and the adjustable waist on the pants, which will definitely help as he grows. It looks like a much more expensive suit than it actually is. Even though my son will have to grow into it, I’m already excited for him to wear it. I’m thinking it will be perfect for Easter next year or any special occasion. It’s such a cute outfit, and I love that the pieces can be mixed and matched for different looks. Overall, I’m really happy with this purchase and can’t wait to see him wearing it! The blue color goes well for any occasion and I may have to order my husband a suit in matching shade of blue so they can be twins. The size looks accurate for boys 5T. I took a picture to show the pants next to a pair of unwashed Oshkosh B’Gosh brand straight leg 5T boys denim jeans.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
J
Jordan
San Leandro, US
★★★★★ 5
Perfect Summer Suit for Boys – Stylish and Comfortable!
Size: 5, Color: Light Green
I’m so impressed with this **boys' linen summer suit**! 👔🌞 It’s the perfect outfit for warmer weather while still looking sharp and stylish. The **linen fabric** is lightweight and breathable, making it ideal for those hot summer days. My son looked fantastic in it, and he was comfortable all day long, which is a big plus! The suit fits **true to size**, and the cut is modern yet classic. The **jacket** has a great, tailored look without being too stiff, and the **trousers** are just the right fit—not too baggy or too tight. It’s a very **polished** look for events like weddings, family gatherings, or holiday parties. I also love that the **color options** are vibrant and fresh, perfect for summer. The suit is **easy to care for**—I was worried about linen wrinkles, but it’s held up well after a few washes, and the fabric still looks crisp. Overall, this **boys' linen summer suit** is an excellent purchase for any special occasion or just to make your little one look extra sharp during the summer months. **Comfortable, stylish, and durable**—highly recommend! 🌟👔
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Reviewed in the United States on March 10, 2026
M
MScala
Waukegan, US
★★★★★ 5
Nice summer suit for my son
Size: 6, Color: Light Green, Size: 6, Color: Light Green
I got this linen suit for my 7 year old son and it looks really nice on him. The set comes with the blazer, vest, and pants, which makes it look very polished when worn together. The material is lightweight and breathable, which is great for warmer weather. It has that classic linen look but still feels comfortable enough for kids to move around in. My son wore it for a few hours and didn’t complain about it being uncomfortable. I also like the little details like the pockets, the adjustable back on the vest, and the adjustable waistband on the pants. Those features really help with getting a better fit. Another nice thing is that you can mix and match the pieces. He can wear the vest and pants for a slightly more casual look or the full suit for more formal occasions. Overall it’s a really nice suit for kids, especially for events like weddings, family gatherings, or school events. My son looked great in it and it worked perfectly for the occasion.
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Reviewed in the United States on March 11, 2026
J
Verified Purchase
Joseph
Chelsea, US
★★★★★ 5
A good First Communion suit
Size: 6, Color: White, Size: 6, Color: White
This suit looks and feels really nice even though it’s not 100% linen. My son is an average size 7 year old, but I got a size 6 so that the fit would be nice and snug and not loose and baggy. It was the right choice. Comes with a bow tie which is nice, a tie (which is very cheap and poorly made) and a pocket square.
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Reviewed in the United States on April 29, 2026
C
Verified Purchase
Cheila
Grantham, US
★★★★★ 5
Very stylish💜💜
Size: 6, Color: Light Blue, Size: 6, Color: Light Blue
This little suit for boys is very stylish. I bought it for my grandson for a wedding occasion and it looked very nice. The fabric is not too thick so for the summer wedding it was great. I pick the blue color and it looked fantastic!
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Reviewed in the United States on March 16, 2026

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