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Description
Long Tube Header for 1968-74 Oldsmobile Cutlass 5.7/6.6 - Ceramic Coated - 31150FLT FlowTechOverview: Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5 16" 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 5/16" 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:
- Fuel Economy From The Engine
- Leak Test For Max Performance
- Ceramic Headers
- Rust And Corrosion Resistance
- Mandrel-Formed Power Plenum
- Leakproof O-Ringed Port Seals
- Include All Mounting Hardware
Application:
| Year | Make | Model | Engine | Fitment Notes |
| 1968-1969 | Oldsmobile | 442 | 6.6L V8 400 CID | See Below! |
| 1968-1974 | Oldsmobile | Cutlass | 5.7L V8 350 CID | See Below! |
| 1968 | Oldsmobile | Cutlass | 6.6L V8 400 CID | See Below! |
Fitment Notes:
- Will not fit column mounted standard or floor mounted automatics or Cutlass Supreme models.
- Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Flowtech recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage.
- The use of header wraps can cause the header tubes to crack or rust due to excessive heat and moisture build-up. Flowtech does not recommend the use of header wraps as this will void the warranty.
- Recommended replacement gasket - Mr. Gasket part# 453
- Must modify exhaust system to retain catalytic converters.
Specs:
| Bolt Size | 3/8-16 x 3/4 In. |
|---|---|
| Brand | Flowtech |
| Collector Diameter | 3.00 inch |
| Emission Code | 4 |
| Engine | Oldsmobile V8 |
| Header Finish | Silver Ceramic |
| Header Style | Long Tube |
| Primary Tube Dia. | 1-3/4 inch |
| Product Type | Headers |
| Tube Material | Mild Steel |
Emissions:
- This part is legal for sale or use on Racing Use Only Vehicles
- The following vehicles are considered Racing Use Only Vehicles:
- Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.
- WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
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
4.3 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Cute Rhymes and wonderful info
Format: Board book, Format: Board book
This book is super cute and makes bugs interesting with it's colorful pages and different big varieties. The book rhymes throughout the pages and it's so cute and almost reminds me of song that could have sung by the "Animaniacs" (my age is showing lol). In one of the pics I show the cover damaged but that's from my son chewing on the book. Just because it's a board book doesn't meant it's exempt from damage, just makes it last a little longer than a paperback.
I also REALLY like that there is a page that lists the bugs seen along with their names which is helpful in teaching your little one! My son enjoyed this beautiful book. :)
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Reviewed in the United States on January 15, 2023
★★★★★ 5
Perfect size, cute illustrations and words
Format: Board book
My toddler girl is super into bugs right now. This book was suggested alongside a bunch of other bug books I purchased (Maisy’s Nature Walk, Bugs, All Because a Little Bug Went Kachoo, The Lonely Firefly, A Good Place). What a great find!
It’s the perfect board book size for me to hold or for my toddler to hold. The illustrations are darling and the words simple enough that my almost 2 year old has pages memorized. When she sees a picture she’ll spout out the words. I appreciate the back page with the illustration of all bugs with their names because lord knows my toddler asks me time and time again “what’s that?!” and mommy is fresh out of lies. My insect knowledge is clearly not as profound as my daughter.
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Reviewed in the United States on October 4, 2024
★★★★★ 5
Highly recommend!
Format: Board book
Exceeded my expectations! I wanted some nature themed books for my grandson, and this is perfect! Simple, beautiful, educational, and age appropriate.
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Reviewed in the United States on March 19, 2026
★★★★★ 5
This book is like crack to my 16 month old
Format: Board book
I bought this book as a gift for my friend's son, but when it arrived, my daughter saw it and wanted me to read it to her, so I did. Then again. Then again. Needless to say, I had to buy a second copy to send to my friend's son. It's been about a week, and my daughter is OBSESSED. There have been tantrums when we need to stop reading Some Bugs to do something else. It's by far her favorite book. The illustrations are so colorful and layered, there are so many things to look at. She loves pointing at the different bugs (her favorite ones are the hawk moth and the dog tick). The text has a great rhythm and is fun to read, I'm not tired of it yet after our hundredth reading. I highly recommend this gorgeous, fun book.
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Reviewed in the United States on April 15, 2021
★★★★★ 5
Perfect for learning about bugs!
Format: Board book
Purchased this because my kids class is learning about bugs. It is so cute, and both my kids my 3 year old and almost 2 year old love it! The pictures are so cute, and they really do go through each bug, making it educational. Such a fun book at a great price for 1-3 year olds.
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Reviewed in the United States on May 19, 2024