These Hooker BlackHeart cast iron exhaust manifolds feature a 2.25-inch outlet and a natural cast finish, designed to sit close to the engine block for a wide range of replacement and engine-swap applications. The contoured design directs exhaust flow towards the exit port, enhancing performance. Made from durable cast iron, they ensure long-lasting, leak-free operation while reducing under-hood noise compared to traditional headers. Additionally, the shorty design allows for exhaust tubing to be routed closer to the frame or floor pan, maximizing ground clearance.

8501-4HKR Blackheart LS Cast Iron Exhaust Manifolds Features:

• Tight tuck/block hugger design for broader fitment for most popular chassis
• Free-Flowing for great performance
• Hi-Silicon-Moly Ductile Iron construction
• Nickel Plated steel mating flanges included (fasteners and gaskets are not included)
• Excellent corrosion resistance
• 2 Bolt exit flange configuration works with factory gaskets and fasteners

Fitment Notes:

• Intended applications for this product are the retro-fit installation of LS engines into popular Cars and Truck chassis
• Compatible with All GM LS (except LS7/LS9) Engine Swap Applications
• Not Compatible with 2004-2006 GTO Starters/Bellhousing
• Validated for Fitment on 1970-1981 GM F-Body, 1982-1988 GM G-Body and 1968-1972 GM A-Body with LS Engine

Emissions Note:

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