Hooker BlackHeart Rear Dump Exhaust Manifolds with 2.5” Outlet for GM LS Engines

Give your GM LS engine the best durability, quiet operation, and leak-free sealing possible via these rear dump exhaust manifolds! Courtesy of Hooker BlackHeart, these manifolds are cast from a unique Hi-Silicon-Moly ductile iron blend. Not only does this give them immense strength, but it also guarantees they’re safe from corrosion. You can opt either for a natural cast finish which resembles the factory look or a black ceramic coat for better heat protection.

Features and Benefits:
- “Rear Dump” Exhaust Manifolds with Tight-Tuck Design
- Ideal for GM LS Engine Swaps
- Available with Natural or Black Ceramic Finish
- Cast from Hi-Silicon-Moly Ductile Iron
- Highly Durable & Corrosion Resistant
- Creates Exit Between Standard Swap & Center Dump Manifolds
- 2.5” Diameter Outlet Boosts Flow
- Great with Hooker Engine Swap Mount Plates
- Complements Holley Engine Swap Oil Pans
- Includes Mating Flanges, Gaskets, & Hardware

The headers pair excellently with engine swap mounting plates from Hooker as well as engine swap oil pans from Holley. Regardless of whether you have either, the 2.5” diameter outlet is sure to boost flow within your LS engine. The package is complete with nickel-plated steel mating flanges, MLS mating flange gaskets, and mating flange hardware for straightforward installation.

Vehicle Fitment:
- 1965-1995 Ford Mustang
- 1966-1977 Ford Bronco
- 1948-1979 Ford F-100
- 1960-1987 Chevy C10
- 1988-1998 Chevy/GMC C/K

Additional Notes:
- Not compatible with 2004-2006 GTO starters/bellhousings.
- Ceramic-coated manifolds require several heat cycles to fully cure before they can withstand extreme heat. Prior to putting the vehicle into service, they should undergo a series of 4 to 5 intermittent heat cycles to "set" the coating. An incremental increase in run duration and throttle angle should be added to each successive cycle; initial and final run durations between approximately 1 and 7 minutes will be sufficient to set the coating.
- Breaking in an engine while using the ceramic-coated versions of these manifolds will most likely result in damage to the coating and void all warranties providing coverage to it. Hooker recommends using bare cast-iron manifolds or an old set of headers to break-in engines to avoid coating damage.