For applications or projects where standard LS swap manifolds (8501HKR, 8502HKR, 8503HKR series) don't quite fit and "center dump" manifolds (8504HKR) exit too far forward, the new rear dump and rear dump SBC exit cast iron swap manifolds have arrived. These differ in that they exit in a straight-down fashion much like a block hugger header, but exit more toward the rear of the engine than "center dump" manifolds. While almost the same as the 8505HKR line, the 8506HKR line shares the same driver side manifold, but has the passenger side exit of traditional Small Block Chevrolet manifolds (see 8525HKR) to guarantee fitment and possibly bolt up your existing exhaust when doing an LS swap. Cast out of the same Hi-Silicon-Moly Ductile Iron as most of the other lines, it will be tough to find a more durable, streamlined, and quiet exhaust option. Available in natural cast, silver ceramic, or black ceramic finishes, these manifolds are offered with flanges, gaskets, and flange hardware for connecting to a variety of adapter pipe kits or for ease in fabricating your own custom exhaust.

8506HKR-3 Blackheart LS Swap Cast Iron Exhaust Manifolds Features:

• Similar to SBC manifolds (8525HKR) but for Gen III/IV LS engines
• Raised up 1.36-inches (driver side) / tucked in tighter by 0.625-inches on (passenger side)
• 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 w/ gaskets and fasteners included
• Excellent corrosion resistance
• 2 Bolt exit flange configuration

Emissions Note:

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