SKU: 79412790137

Long Tube Header for 1968-74 Oldsmobile Cutlass 5.7/6.6 - Ceramic Coated - 31150FLT FlowTech

Sale price$263.23 Regular price$292.48
Save 10%

Pay in installments of $73.12 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 30 - Aug 4

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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:
  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: 79412790137

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.3 ★★★★★
Based on 16 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
L
Verified Purchase
Liz
Birmingham, US
★★★★★ 5
Good for the price
Color: Black, Size: 10 Years
Great suit for the price and it includes the shirt which It was a great surprise
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
V
Verified Purchase
Vicki Fontana
New York, US
★★★★★ 5
One size smaller is perfect!
Color: Navy, Size: 10 Years
This suit fit perfect but I did order one size smaller than my grandson normally wears. It is very well made and he can't wait to wear it in the wedding.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2026
L
Verified Purchase
Laurie Rygiel
Whiting, US
★★★★★ 5
Suit
Color: Beige, Size: 10 Years
Our grandson looked so handsome!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
T
Verified Purchase
TG88
Charlottesville, US
★★★★★ 3
Fits wide
Color: Navy, Size: 7 Years
Nice suit but fits wide IMO
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026
T
Verified Purchase
Tracie
Lexington, US
★★★★★ 5
Great material, sharp looking suit!
Size: 7, Color: Light Blue
Very nice suit! We got tons of compliments. Please note it does NOT come with an undershirt. We used this for a First Holy Communion, but I wouldn't hesitate to use it in a wedding! The material was the best that I've seen compared to the four other suits I bought on amazon (I was skeptical and crunched for time)...this won! Great value for the money too. My kid felt very sharply dressed, and wants to find another occasion to wear this light blue suit lol
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026

recommand products