Upgrade your 1967-1987 Pontiac Bonneville Catalina Firebird Grand Prix—with FLASHARK exhaust headers. Built for Gen I Small Block Chevy 265–400 V8 engines, these stainless steel headers boost horsepower, lower exhaust backpressure, improve airflow and feature a simple bolt-on design for hassle-free installation.
Specifications:
Brand Name: FLASHARK
Certificate: ISO9001:2000
Application: Automobile Exhaust Header
Material: Stainless Steel
Surface: Mirror Polish
Primary Tube Size: 1 5/8"
Outlet Flange Thickness: 3/8"
Standard SBC 3-Bolt Flange Inlet / Outlet: 2.875 in
Features:
2 X 4-1 High Performance Racing Spec. Design
Hugs the block for a closer fit and extra clearance
CNC machine flanges with TIG and MIG welded construction
Maximizing Smoothest High Exhaust Air Flow Rate
Computerized Mandrel-Bended to Maximize Air Flow Smoothness
Increase Engine Exhaust Output and Efficiency
Increase High Flow Air, Instantly Gain 10 -15 Hp. / Tq.
Package including:
- 1 x Set of Stainless Steel Headers
- 1 x Set of Mounting Accessories
- Just as the pictures show
What are exhaust manifolds for?
Boost Horsepower, Torque, and Performance with FLASHARK Headers!
Upgrading your headers and exhaust system is an excellent way to increase horsepower and torque while enhancing engine efficiency. FLASHARK performance headers are engineered to maximize exhaust flow, reduce backpressure, and deliver a strong horsepower gain for your GM muscle car and classic vehicle. With these headers, you can instantly add up to 10–15 horsepower, giving your ride the aggressive power and iconic sound of a true American muscle car.
These headers are precision-built for 1967-1987 Pontiac Bonneville Catalina Firebird Grand Prix equipped with Gen I Small Block Chevy 265–400 V8 engines, offering a bolt-on perfect fit and reliable, high-output performance.
In addition to performance gains, installing a high-performance exhaust setup such as FLASHARK headers can also improve fuel economy by roughly 0.5 mpg. While this may seem modest, the savings add up over time: with gas at $3 per gallon and 15,000 miles driven annually, you can save approximately $85 per year on fuel. Over five years, these savings can nearly cover the cost of a complete cat-back exhaust system.
Actual Product Images
Exhaust Header VS Manifold, which is the better choice?
When comparing exhaust headers to traditional exhaust manifolds, the difference in design and material is clear. Exhaust headers, made from lightweight stainless steel, are longer and feature individual tubes for each cylinder, optimizing exhaust flow and reducing backpressure. In contrast, exhaust manifolds are made of thick iron, which tends to create backpressure that can hinder engine performance. By eliminating this restriction, headers allow for better airflow, enhancing horsepower and torque.
Upgrading to FLASHARK exhaust headers is a must if you're looking to improve the performance and sound of your Camaro, Chevelle, Malibu, El Camino, Nova, or Monte Carlo. These headers are designed to deliver maximum exhaust flow, reducing backpressure and providing a significant boost in horsepower—adding up to 10-15 hp.
Whether you're cruising down the road or taking your car to the track, FLASHARK headers give your vehicle the American muscle car sound and performance you’ve always wanted. Installation is straightforward with a direct bolt-on design—no modifications required. Upgrade today and enjoy improved engine efficiency, power, and a deeper exhaust note.
Fitment & Compatibility
⚠️ CRITICAL FITMENT RULE (MUST READ FIRST)
✅ Verified Fitment
| Brand | Model | Year Range | Full Compatible Specs |
|---|---|---|---|
| Pontiac |
|
1967-1987 | Small Block Chevy (SBC) 283/327/350/400 V8 Engine |
| Pontiac |
|
1967-1987 | Small Block Chevy (SBC) 283/327/350/400 V8 Engine |
| Pontiac |
|
1967-1987 | Small Block Chevy (SBC) 283/327/350/400 V8 Engine |
| Pontiac |
|
1967-1987 | Small Block Chevy (SBC) 283/327/350/400 V8 Engine |
Q1: Which specific vehicle models and platforms are these FLASHARK exhaust headers compatible with?
A1: These performance headers are precision-engineered for a wide range of General Motors (GM) vehicles built between 1967 and 1987 equipped with Small Block Chevy (SBC) V8 engines. This includes iconic classic platforms such as the F-body (1967-1981 Camaro & Firebird), A-body/G-body (Chevelle, Malibu, El Camino, Monte Carlo, Oldsmobile Cutlass, Buick Regal, Pontiac Grand Prix), X-body (Nova), and 1973-1987 Chevy/GMC C10/K10 square-body trucks.
Q2: The product title mentions Pontiac, Buick, and Oldsmobile. Will these headers bolt onto original non-Chevy V8 engines?
A2: No, these headers are designed strictly for Small Block Chevrolet (SBC) V8 architectures (such as the 283, 305, 307, 327, 350, and 400 c.i.d.). They are compatible with Pontiac, Buick, and Oldsmobile vehicle models *only* if those cars have undergone a Small Block Chevy engine swap—which is an incredibly popular modification. They will not fit division-specific factory engines like an Olds 350/403, Pontiac 400, or Buick 350.
Q3: Do these FLASHARK classic headers clear both straight and angled spark plug cylinder heads?
A3: These headers are optimized primarily for standard factory straight spark plug configurations. If you are running high-performance aftermarket cylinder heads with angled spark plugs, clearance between the primary tubes and the spark plug boots will be extremely tight. For angled setups, we highly recommend using shorty-style spark plugs and 90-degree high-temperature ceramic or silicone spark plug boot protectors to prevent wire burning.
Q4: Will these long-tube headers clear the steering shaft, starter motor, and chassis rails?
A4: Yes, these headers are advanced CAD-engineered to ensure excellent clearance around the steering column shaft, factory brake proportioning valves, and frame rails on Left-Hand Drive (LHD) configurations. While they clear standard factory starter motors perfectly, upgrading to a compact, high-torque mini-starter is highly recommended to maximize heat clearance and ease the installation process.
Q5: What are the exact dimensions, primary tube diameters, and collector specifications?
A5: This high-flow header kit features 1-5/8 inch CNC mandrel-bent primary tubes designed to maximize exhaust scavenging and gas velocity. The primary runners converge smoothly into a heavy-duty 3-inch collector, providing a massive boost in low-to-mid-range torque and high-RPM horsepower that breathes new life into your classic engine.
Q6: What kind of horsepower and torque gains can I expect on a Small Block Chevy 350 engine?
A6: By replacing your heavy, restrictive factory cast-iron exhaust manifolds with FLASHARK smooth, equal-length long-tube headers, you can expect an estimated dyno-proven increase of 15 to 28 horsepower and 20 to 32 lb-ft of torque. You will immediately notice crisper throttle response and a significantly deeper, more aggressive classic muscle car exhaust note.
Q7: What material is used to build these headers, and how do they resist corrosion over time?
A7: Every FLASHARK header set is meticulously crafted from premium, heavy-gauge T304 Stainless Steel featuring precise TIG-welded seams and a stunning mirror-polished finish. Unlike cheap mild steel or painted headers that chip, peel, and rust within months, T304 stainless steel offers ultimate protection against high exhaust temperatures, moisture, and road salt, ensuring lifetime structural integrity.
Q8: Does the package include all required gaskets and mounting hardware for installation?
A8: Yes, this is an all-inclusive, install-ready package. The kit comes complete with a matching pair of polished stainless steel headers, heavy-duty multi-layer high-temperature header gaskets, collector reducers, and a full set of mounting bolts, ensuring an absolute, leak-free seal right out of the box.
Q9: How does the FLASHARK design prevent common header flange leaks and warping?
A9: Cheap budget headers are notorious for blowing out gaskets due to thin, flimsy flanges that warp under extreme heat. FLASHARK solves this problem by utilizing extra-thick, precision CNC-machined head flanges. This heavy-duty construction distributes clamping force evenly across the exhaust ports, absorbing thermal expansion and completely eliminating the risk of warping or exhaust leaks.
Q10: Will these headers clear vehicles equipped with column shifters or manual transmission mechanical linkages?
A10: These headers offer flawless clearance for floor-shifted automatic transmissions and modern cable-shifted setups. However, if your classic vehicle is equipped with an old-school column shifter or a mechanical manual transmission clutch linkage (Z-bar), the linkage rod may pass extremely close to the primary tubes. In some cases, slight adjustment, clearancing, or minor modification to the linkage rod might be required.
Q11: Are these high-flow stainless steel headers street legal or intended only for track use?
A11: These performance headers are designed for classic vintage vehicles (1967-1987), hot rods, and custom builds. In many regions, vehicles of this era are entirely exempt from modern emissions and smog testing. However, because they alter factory exhaust configurations, please verify your local state, regional, or provincial vehicle modification laws prior to purchasing.
Q12: Why should I choose FLASHARK headers over alternative budget brands on the market?
A12: FLASHARK refuses to compromise on material and manufacturing tolerances. While competitors use inferior T201 stainless steel or thin flanges that distort under heat, we stand by high-purity T304 stainless steel, ultra-thick laser-cut flanges, and mandrel-bent perfection. Backed by fast, free US domestic shipping, a comprehensive warranty, and dedicated support, we deliver premium race-level engineering at an unbeatable price.