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- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 20 - Aug 25
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Flowtech 31100FLT SBC Small Block Chevy 350 Long Tube Header, Ceramic CoatedOverview: Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 3 8" flanges with sealing rings for a leak free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat and corrosion resistant metallic ceramic thermal coating that increases exhaust velocity and reduces
Overview:
Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 3/8" flanges with sealing rings for a leak-free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat and corrosion resistant metallic ceramic thermal coating that increases exhaust velocity and reduces underhood temps for increased performance.
Features:
- Tuned-length primary tubes for street performance
- Mandrel-bent tubing for smooth exhaust flow
- Light weight & sturdy 16 gauge tubing
- Mandrel-formed Power Plenum collector for low back pressure
- Sturdy, leak-tested O-Ring port seals
- Engineered for a precision fit
- Designed for easy, trouble-free installation
- Includes all mounting hardware and premium gaskets
- Works with factory power steering and power brakes
Fitment Notes:
- Works with factory power steering and power brakes
- Will NOT fit 67-69 Camaro with Air Conditioning
- Will NOT fit with angle plug heads or raised port heads
- Factory motor mounts must be used for proper engine placement
- Does NOT fit with manual transmission on Monte Carlo and late model passenger wagons
- Must modify exhaust to retain cat. conv.
- 68-74 Chevy II/Nova will NOT fit with A.I.R. injection pump
Applications:
| Year | Make | Model | Engine | Fitment Notes |
| 1973-1974 | Buick | Apollo | 5.7L V8 350 CID | Please See Above! |
| 1965-1967 | Buick | Gran Sport | Small Block Chevy Swap | Please See Above! |
| 1970-1972 | Buick | GS | 5.7L V8 350 CID | Please See Above! |
| 1968-1969 | Buick | GS 350 | 5.7L V8 350 CID | Please See Above! |
| 1968-1969 | Buick | GS 400 | Small Block Chevy Swap | Please See Above! |
| 1970-1972 | Buick | GS 455 | Small Block Chevy Swap | Please See Above! |
| 1968-1972 | Buick | Skylark | 5.7L V8 350 CID | Please See Above! |
| 1968-1969 | Buick | Special | 5.7L V8 350 CID | Please See Above! |
| 1968-1972 | Buick | Sportwagon | 5.7L V8 350 CID | Please See Above! |
| 1967-1969 | Chevrolet | Camaro | 4.9L V8 302 CID | Please See Above! |
| 1969-1973 | Chevrolet | Camaro | 5.0L V8 307 CID | Please See Above! |
| 1967-1969 | Chevrolet | Camaro | 5.3L V8 327 CID | Please See Above! |
| 1968-1969 | Chevrolet | Camaro | 5.4L V8 327 CID | Please See Above! |
| 1967-1974 | Chevrolet | Camaro | 5.7L V8 350 CID | Please See Above! |
| 1968-1972 | Chevrolet | Chevelle | 5.0L V8 307 CID | Please See Above! |
| 1964-1968 | Chevrolet | Chevelle | 5.3L V8 327 CID | Please See Above! |
| 1965 | Chevrolet | Chevelle | 5.4L V8 327 CID | Please See Above! |
| 1967-1968 | Chevrolet | Chevelle | 5.4L V8 327 CID | Please See Above! |
| 1968-1972 | Chevrolet | Chevelle | 5.7L V8 350 CID | Please See Above! |
| 1968-1972 | Chevrolet | El Camino | 5.0L V8 307 CID | Please See Above! |
| 1964-1969 | Chevrolet | El Camino | 5.3L V8 327 CID | Please See Above! |
| 1968 | Chevrolet | El Camino | 5.4L V8 327 CID | Please See Above! |
| 1968-1972 | Chevrolet | El Camino | 5.7L V8 350 CID | Please See Above! |
| 1964-1967 | Chevrolet | Malibu | 5.3L V8 327 CID | Please See Above! |
| 1969-1971 | Chevrolet | Nova | 5.0L V8 307 CID | Please See Above! |
| 1972-1974 | Chevrolet | Nova | 5.7L V8 350 CID | Please See Above! |
| 1971-1972 | GMC | Sprint | 5.0L V8 307 CID | Please See Above! |
| 1971-1972 | GMC | Sprint | 5.7L V8 350 CID | Please See Above! |
| 1964-1971 | Oldsmobile | 442 | Small Block Chevy Swap | Please See Above! |
| 1968-1972 | Oldsmobile | Cutlass | 5.7L V8 350 CID | Please See Above! |
| 1968-1972 | Oldsmobile | Cutlass Supreme | 5.7L V8 350 CID | Please See Above! |
| 1968-1972 | Oldsmobile | F85 | 5.7L V8 350 CID | Please See Above! |
| 1973-1974 | Oldsmobile | Omega | 5.7L V8 350 CID | Please See Above! |
| 1968-1972 | Oldsmobile | Vista Cruiser | 5.7L V8 350 CID | Please See Above! |
| 1968-1971 | Pontiac | Acadian | 5.0L V8 307 CID | Please See Above! |
| 1968 | Pontiac | Acadian | 5.3L V8 327 CID | Please See Above! |
| 1968-1971 | Pontiac | Acadian | 5.7L V8 350 CID | Please See Above! |
| 1964-1967 | Pontiac | Beaumont | 5.3L V8 327 CID | Please See Above! |
| 1964-1972 | Pontiac | GTO | Small Block Chevy Swap | Please See Above! |
| 1968-1972 | Pontiac | LeMans | 5.7L V8 350 CID | Please See Above! |
| 1968-1970 | Pontiac | Tempest | 5.7L V8 350 CID | Please See Above! |
| 1971 | Pontiac | Ventura | 5.0L V8 307 CID | Please See Above! |
| 1972-1974 | Pontiac | Ventura | 5.7L V8 350 CID | Please See Above! |
Specs:
| Brand | Flowtech |
|---|---|
| Collector Diameter | 3.00 inch |
| Emission Code | 4 |
| Engine | Chevrolet Small Block Gen I |
| Header Finish | Silver Ceramic |
| Header Flange Thickness (in) | 3/8 inch |
| Header Style | Long Tube |
| Primary Tube Dia. | 1-5/8 inch |
| Product Type | Headers |
| Tube Material | Mild Steel |
| Part Number | 31100FLT |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.4 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Incredible Deal! I bought 2 full suits and absolutely love them!
Size: Medium, Color: Grey
Great looking suit! True to the American Size Chart! I got a lot of compliments the very first day of wearing it! I feel lucky, the Medium Fits like it was tailored! 5’11 (6’ with shoes on, ladies) 190lb. Stocky build. The stretchy waist band is a game changer fellas! Love that! Just like in the video they’re very fun to dance in! The Medium is a lil snug in areas for me but I am currently dieting etc, so if you don’t wanna worry I’m sure the next size up for you fits just as good and will have more breathing room for your arm muscles, thighs, mid section etc as the entire material itself is not stretchy, just the waistband which is incredible!. Overall these are a GREAT score at an amazing price! Perfect for that special occasion or for upgraded business attire! Great Quality! Great Value! and You’ll feel great about yourself in these when you find your faves!
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Reviewed in the United States on February 21, 2026
★★★★★ 1
Packaged in aWrinkled Ball and Bad Sizing
Size: X-Large, Color: Black
I've tried 3 of these suits, 2 different sizes, and each one fits differently. Each one has also been crinkled up and wrinkled each time I opened it. I wouldn't be surprised if it was returned and sent right back out without inspection.
Other reviews noted order a size up. I have a size 34 waist and normally order Large, so I ordered an XL. XL barely can be zippered up. So I returned it. Ordered and XXL. XXL is about 6 inches way too big and took 2 weeks to arrive. So I order and XL again, and once again, way too small, but still bigger than the first..
There is no tag on the pants, only the jacket, so I think someone screwed up the sizing or matching the jacket with the pants.
Total waste of time with 3 returns. Label your products right and get your sizing chart right. There should not be an 8 inch difference between XL and XXL. Got another trip out to UPS, thanks...
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Reviewed in the United States on January 21, 2021
★★★★★ 4
Hubby looks good in it!
Size: Large, Color: Black, Size: Large, Color: Black
This suit is very nice! But it doesn’t have the pockets we were expecting. The left chest pocket is sewn shut along with the outside pockets. It doesn’t have 1 or 2 pockets inside the jacket. Hubby looks good in it!
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Reviewed in the United States on March 5, 2026
★★★★★ 5
Great quality, we could've sized up.
Size: X-Large, Color: Black, Size: X-Large, Color: Black
This suit was absolutely stunning! My son looked amazing in it for homecoming. With him being 6'4", the length was perfect, but it was a but too snug in his thighs, as he is a muscular athlete, and he was a bit worried sitting down in it!😂 Nonetheless, it held up well for my huge Samoan baby, and he got many compliments on it. We also found a bow tie to match it perfectly with the same pattern.
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Reviewed in the United States on September 30, 2024
★★★★★ 3
Jackets made too small and too tight
Size: X-Large, Color: Black
My son is 6'2" & 185 lbs and normally wears a 36 in pants. Site recommends a large, but I ordered an xxl based off the reviews. It was way too big in pants and jacket! I then ordered the large and the xl to be on the safe side because prom was fastly approaching. The large was too small! The xl was okay, but not perfect. Somehow it seems they need a suit size in between the xl and xxl, leading me to think they were just sewn wrong. The pants were extra long (good thing for us), they had to be hemmed. He did need a belt, but not by much. He was able to bend and sit with the pants on. The jacket however still runs small in my opinion. It is too tight in the arms, making it difficult to move. It is also on the short side in sleeves and length. It definitely shows when raising your arms. We chose this suit because we THOUGHT it was the pattern of his date's prom dress; turns out it wasn't. But it matched the vest we bought perfectly.
This suit is made of a thin silky material and it runs small. And the pockets ARE useable. You just need to find the starter hole and remove the thread (if closed). I would recommend buying a different suit unless you order it bigger and have the time and money to alter it.
Oh, and it will take a while to get a refund. Suits ship to you fast, but goes back slow. You gotta wait til the company receive the item, then still wait for the refund.
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Reviewed in the United States on May 6, 2026
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