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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 ★★★★★
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Product Reviews
★★★★★ 5
My Favorite Flavored Sparkling Water
Flavor Name: Black Raspberry, Size: 17 Fl Oz (Pack of 12)
Sparkling Ice Black Raspberry has honestly become my favorite flavored sparkling water. The flavor is strong enough to actually taste satisfying without being overly sweet, and it has a really refreshing balance compared to many other zero-sugar drinks.
One thing I especially like is that it feels much more enjoyable than plain water while still avoiding the heavy sugary feeling that comes with regular soda. The carbonation level is also good in my opinion because it gives the drink a crisp texture without feeling overly aggressive or flat.
The black raspberry flavor stands out nicely and does not have the strange aftertaste that some zero-sugar drinks tend to develop. It has consistently been one of the easiest flavored waters for me to keep buying regularly.
I also appreciate the added vitamins and the convenience of having a flavorful alternative available when trying to avoid higher-calorie drinks.
Overall, this has easily been my go-to sparkling water, and I would highly recommend it to anyone looking for a flavorful zero-sugar drink option that still feels refreshing and satisfying.
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Reviewed in the United States on May 16, 2026
★★★★★ 5
BEST SPARKLING ZERO SUGAR FRUIT WATER DRINK
Flavor Name: Black Raspberry, Size: 17 Fl Oz (Pack of 12)
LOVE THIS WATER. ZERO SUGAR, YES, ZERO SUGAR!..GREAT SWEET TASTE AND NO YUCKY AFTER TASTE. I AM DIABETIC AND HAVE TO WATCH MY FLUID INTAKE DUE TO MY HEART DECEASE OF 40 OZ'S A DAY. SINCE THESE ARE INDIVIDUAL, I DRINK HALF OF A BOTTLE. I LOVE THE BLACK RASPBERRY. I CRAVE THE CARBONATION {PROB FROM ALL MY MEDS SINCE I HAVE DRY MOUTH } AND THESE HELP MY THIRST CRAVINGS. COST IS REASONABLE AND I HAVE SUBSCRIBED & SAVE. YES THEY DO GIVE ME ENERGY, AND I WOULD HIGHLY RECOMMEND THESE!
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Reviewed in the United States on February 4, 2026
★★★★★ 5
Great price
Flavor Name: Black Raspberry, Size: 17 Fl Oz (Pack of 12)
I've ordered numerous flavors of Sparkling Ice and enjoyed each flavor...but I love the black raspberry the best!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
★★★★★ 5
My Go-To Beverage
Flavor Name: Black Raspberry, Size: 17 Fl Oz (Pack of 12)
Black Raspberry Sparkling water is my go-to drink. The taste is not too sugary and the carbonation is not too strong. I have this on auto delivery and often order additional cartons when I run out too quickly. It's also much better priced at Amazon than at the grocery stores near me. I also like the fact that I don't need to lug it home. Added vitamins make this a got-to-have product.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Flavor is good.
Flavor Name: Black Raspberry, Size: 17 Fl Oz (Pack of 12)
These are great. I re-order 2 cases every two weeks.
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Reviewed in the United States on May 19, 2026