Specifications:
Brand Name: FLASHARK
Model: EH28945X
Certificate: ISO9001:2000
Application: Automobile Exhaust Header
Material: Stainless Steel
Surface: Mirror Polish
Primary Diameter 1-3/4 in. (45mm)
Collector Diameter 3 in. (76mm)
Head Flange Thickness 3/8 in. (9.5mm)
Pipe Thickness 16 gauge (1.5mm)
Purchase instructions:
professional installation is highly recommended, exhaust systems are not always perfect, and while most of the time these exhaust systems work perfectly together, occasionally a slight modification to the exhaust system is required to achieve the perfect fit.
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
Chevrolet Models
- Camaro (1970-1981) | Chevelle (1964-1977)
- El Camino (1964-1988) | Malibu (1978-1988)
- Monte Carlo (1970-1988) | Nova (1975-1979)
Pontiac Models
- Firebird (1970-1981) | GTO (1964-1972)
- Grand Prix (1977-1988) | Lemans (1964-1988)
Oldsmobile Models
- Cutlass (1964-1977)
Buick Models
- Skylark (1964-1972) | Grand National (1978-1988)
- Models, year ranges, or brands not listed above
- Non-factory original chassis, engine-swapped or heavily modified vehicles
- Non-GM brand vehicles
Frequently Asked Questions: Flashark LS Swap Long Tube Headers (1964-1988 GM A/G/F/X-Body)
Q1: What vehicles and engines do these ls long tube headers fit?
A1: These headers are specifically designed for dropping a modern GM LS-series V8 (4.8L, 5.3L, 5.7L, 6.0L, 6.2L, including LS1, LS2, LS3, and LS6) into classic 1964-1988 rear-wheel-drive GM chassis. This includes popular platforms like the Chevrolet Chevelle, Camaro, El Camino, Monte Carlo, Nova, Pontiac GTO, Firebird, Oldsmobile Cutlass, and Buick Grand National/Skylark.
Q2: Will this exact "flashark exhaust header for 1964-1988 chevrolet pontiac buick ls1/ls2/ls3/ls" fit my specific swap project without modification?
A2: While we engineer these to hug the block tightly and clear standard steering components in factory 1964-1988 GM frames, LS swaps are highly customized projects. Variations in your chosen motor mounts, transmission crossmembers, or steering linkage may require slight dimpling or minor modifications to the header tubes to achieve the absolute perfect fit in your specific chassis.
Q3: What brand are these headers?
A3: These are proudly manufactured by FLASHARK. We specialize in bringing high-quality, ISO9001:2000 certified stainless steel racing exhaust components to the enthusiast market at a price point that makes serious LS swap projects more affordable.
Q4: What are the primary tube and collector sizes on this product?
A4: To ensure excellent exhaust scavenging for your LS engine, these headers feature large 1-3/4 inch (45mm) primary tubes that merge into a high-flow 3-inch (76mm) collector. This sizing is ideal for both stock truck motors (like the 5.3L LM7) and built aluminum block LS3s.
Q5: Will these clear a manual transmission clutch linkage (Z-bar)?
A5: Yes! Several of our customers have successfully installed these on vehicles equipped with manual transmissions. They are routed to provide clearance for hydraulic clutch setups, and many users report they successfully clear factory mechanical Z-bar linkages as well.
Q6: Why should I choose these long tube headers over stock LS cast iron manifolds?
A6: Stock cast iron manifolds restrict exhaust flow and create backpressure, robbing your swapped engine of horsepower. Furthermore, factory truck or Corvette manifolds often hit the frame rails or steering boxes of classic 60s, 70s, and 80s GM cars. Our tubular stainless steel design eliminates backpressure for noticeable horsepower gains while solving the clearance issues inherent to LS swaps.
Q7: What material are these headers made from?
A7: They are constructed from durable, 16-gauge (1.5mm thick) stainless steel and feature a stunning mirror-polished surface finish. The head flanges are precision-machined to a robust 3/8-inch (9.5mm) thickness to prevent warping and ensure a leak-free seal against your LS cylinder heads.
Q8: Do these headers come with installation bolts?
A8: Please note that this specific product SKU is currently shipped without the header-to-cylinder-head bolts. We recommend purchasing a quality set of aftermarket LS header bolts or studs prior to beginning your installation.
Q9: Are these suitable for a 4WD truck swap, like a 1973 Chevy K10?
A9: While primarily designed for 1964-1988 GM passenger cars (A-Body, G-Body, F-Body), some creative builders have used them in 4WD truck swaps (like square body K10s). However, because truck frames and front driveshaft routing differ significantly from passenger cars, you should expect to do some custom fabrication or tube dimpling to clear the frame rails on the passenger side.
Q10: Do these headers include oxygen (O2) sensor bungs?
A10: Like most dedicated long tube racing headers designed for custom swaps, you will need to weld O2 sensor bungs into the collectors or the downstream exhaust pipes depending on your specific wiring harness length and ECU tuning strategy.
Q11: How much horsepower will this product add to my LS swap?
A11: Exact gains depend heavily on your engine's displacement, cam profile, and tune. However, upgrading from restrictive factory cast manifolds to 1-3/4" long tubes typically yields gains of 15 to 25+ rear-wheel horsepower on a standard 5.3L or 6.0L LS engine.