Flashark Exhaust Headers For 1968-1975 Oldsmobile Cutlass/Delta/Vista Cruiser/442 400/455 V8
Enhance the performance of your 1968-1975 Oldsmobile Cutlass, 442, Vista Cruiser, or Delta 88 with FLASHARK's high-performance exhaust headers. Designed for 400 and 455 V8 engines, these stainless steel headers increase horsepower by up to 20 HP and improve fuel efficiency by 0.5 mpg. With a direct bolt-on installation and no modifications needed, they eliminate back pressure, boosting engine performance and delivering a richer exhaust sound.
Specifications:
Brand Name: FLASHARK
Certificate: ISO9001:2000
Application: Automobile Exhaust Header
Material: Stainless Steel
Surface: Mirror Polish
Model: EH28909
Outlet Size: 3.00"
Primary Tube Size: 1.75"
Head Flange Thickness: 7/16"
Outlet Flange Thickness: 3/8"
Add up to 8-20 horsepower, 0.5 mpg gas mileage improvement
Upgrade your 1968-1975 Oldsmobile Cutlass, 442, Vista Cruiser, or Delta 88 with FLASHARK’s high-performance exhaust headers, designed specifically for 400 and 455 V8 engines. These headers increase horsepower by up to 8-20 HP and improve fuel efficiency by 0.5 mpg. They enhance power, torque, and throttle response, delivering a deep, sporty exhaust tone that transforms your car into a true performance machine.
Even a 0.5 mpg increase can add up over time. If you drive 15,000 miles annually at $3 per gallon, you could save around $85 each year—almost enough to pay for a full cat-back system over five years.
With FLASHARK headers, you get a bolt-on design that requires no modifications, making installation fast and hassle-free. Boost your Oldsmobile’s performance with ease and enjoy the benefits of both power and efficiency.
Exhaust Header VS Manifold, which is the better choice?
The structural differences between exhaust headers and manifolds are the material and size. From the material, exhaust headers are made of lighter, thinner steel, while exhaust manifolds are made of thick iron. Exhaust headers are also longer than exhaust manifolds. When in use, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure. Therefore, exhaust headers are a BETTER choice than an exhaust manifold.
Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust sound. FLASHARK offers many products to help you create your own custom engine headers. It's really easy and convenient to use: direct bolt-on, no modification needed.
Fitment & Compatibility
| Brand | Model | Year Range | Full Compatible Specs |
|---|---|---|---|
| Oldsmobile | 442 | 1968-1971 | Factory-Equipped Oldsmobile Big Block V8 Engines:
|
| Oldsmobile | Cutlass | 1968-1974 | Factory-Equipped Oldsmobile Big Block V8 Engines:
|
| Oldsmobile | Delta 88 | 1971-1975 | Factory-Equipped Oldsmobile Big Block V8 Engines:
|
| Oldsmobile | Vista Cruiser | 1971-1974 | Factory-Equipped Oldsmobile Big Block V8 Engine: 455ci (7.5L)
|
Q1: Which specific Big Block Oldsmobile engines do these headers fit?
A1: These Flashark performance headers are engineered specifically for the Oldsmobile Big Block V8 family. They provide a precise fit for both the 400 cubic inch (6.6L) and the legendary 455 cubic inch (7.5L) engines found in classic Olds muscle cars.
Q2: Will these headers fit my 1970 Oldsmobile Cutlass with a 455 engine?
A2: Yes, they are a perfect match. This exhaust header is verified for the 1970-1974 Oldsmobile Cutlass equipped with the 455ci V8. It also fits the 1968 Cutlass with the 400ci engine.
Q3: Are these headers compatible with the Oldsmobile 442?
A3: Absolutely. These headers fit the 1968-1969 Oldsmobile 442 (400ci) and the 1968-1971 Oldsmobile 442 (455ci). Upgrading to these headers is one of the most effective ways to unlock the true power of a 442's big block powerplant.
Q4: Do these fit the Oldsmobile Delta 88 and Vista Cruiser?
A4: Yes. Fitment is verified for the 1971-1975 Oldsmobile Delta 88 (455ci), the 1975 Delta 88 (400ci), and the 1971-1974 Oldsmobile Vista Cruiser (455ci).
Q5: How much horsepower can I gain from this Olds 455 header upgrade?
A5: By replacing restrictive factory cast-iron manifolds with our high-flow tubular headers, you significantly reduce back pressure. Enthusiasts typically see performance gains between 8 to 20 horsepower, along with improved throttle response and torque across the RPM range.
Q6: Can upgrading to performance headers improve my fuel economy?
A6: Yes, by improving engine scavenging and efficiency, these headers can improve gas mileage by approximately 0.5 mpg. While high-performance driving is usually the priority, the increased efficiency helps offset fuel costs during cruising.
Q7: What are the tube and collector sizes for these Oldsmobile Big Block headers?
A7: These headers feature a 1.75-inch primary tube diameter, which is the "sweet spot" for 400/455 engines, and a large 3.00-inch outlet size to ensure maximum exhaust gas velocity and volume.
Q8: What material is used for the construction of these Olds 455 headers?
A8: We use high-quality stainless steel with a mirror-polished surface. This provides a professional show-car look while offering superior durability and resistance to rust and corrosion compared to painted or cast-iron alternatives.
Q9: How thick are the flanges, and will they prevent exhaust leaks?
A9: These headers feature an extra-thick 7/16-inch head flange and a 3/8-inch outlet flange. The heavy-duty thickness ensures a flat, secure seal against the cylinder head, preventing the common "ticking" noise associated with warped, thinner flanges.
Q10: Is this a direct bolt-on installation for my Oldsmobile?
A10: Yes, these are designed as a direct bolt-on for the engine. No major modifications are required to the headers themselves. However, as with any classic muscle car exhaust project, professional installation is recommended to ensure clearance around steering shafts and frame rails.
Q11: Will these headers change the exhaust sound of my classic Olds?
A11: Definitely. You will notice a much deeper, throatier, and more aggressive V8 rumble. The stainless steel tubular design resonates differently than cast iron, giving your 455 or 400 that signature high-performance muscle car tone.
Q12: Do the headers include all necessary hardware for installation?
A12: Yes, each set comes with all necessary hardware and gaskets required for mounting. We recommend using a high-quality sealant or premium gaskets if you are running a high-compression build to ensure a lifelong leak-free experience.
Q13: Why choose Flashark headers over factory Oldsmobile manifolds?
A13: Factory manifolds are heavy, retain excessive heat, and force exhaust gases from all cylinders into a single cramped chamber. Flashark tubular headers give each cylinder its own dedicated path, eliminating back pressure and allowing your Big Block Olds to reach its full potential.