LS Swap Exhaust Manifolds Natural Cast Finish Multi-Fit 2.25 In. Outlet Gen III, Gen Iv Chevrolet LS Engine Hooker BlackHeart

These Hooker BlackHeart cast iron exhaust manifolds have a 2.25-inch outlet, natural cast finish and are designed to hug close to the engine block so they fit into a wide variety of replacement and engine-swap applications. Their contoured design aims the exhaust directly toward the exit port for improved flow.

Being cast iron means they will provide years of leak-free performance with less under-hood noise than traditional headers. Plus, their shorty design means you can route exhaust tubing close to your frame/floor pan for maximum ground clearance.

• Intended for GM LS engine swap applications where durability, quiet operation, and leak-free sealing is desired
• Plain as-cast finish for a factory appearance
• Nickel plated steel mating flanges included (mating flange fasteners are not included)
• 2.25 inch outlet diameter offers improved flow for maximum performance from a cast iron exhaust manifold

2 bolt exit flange configuration matches the E-rod exhaust manifolds for a factory like fitment. This allows the use of factory gaskets and fasteners if desired

• Cast from Hi-Silicon-Moly Ductile Iron to provide durability and corrosion resistance
• Tight tuck design provides universal fit for most popular chassis and a clean traditional muscle car appearance
• Perfect complement to Hooker engine swap mount plates and Holley engine swap oil pans

Details:

• Bolt size: M8 x 1.25 x 25mm
• CARB (California) Compliant: No
• Collector Diameter: 2.25 inch
• Emission Code: 8
• Engine: GM Gen III/IV (LS)
• Exhaust Series: Hooker
• Finish: Natural
• Flange Style: 2-Bolt
• Header Finish: Natural
• Header Style: Manifold
• Material: Cast Iron
• Primary Tube Dia.: 1-3/4 inch
• Product Type: Manifold
• Subframe: Stock
• Tube Material: Cast Iron
• Type of Component: Manifold
• Warning: California Proposition 65

Specifications: