Edelbrock Cyl Head Chrysler Gen III Hemi Perf RPM 2003-Present 5 7L-6 4L V8 73cc CompleteThe Edelbrock #61119 Performer RPM cylinder head is a bolt on performance upgrade for 2005 Present Gen III HEMI 6. 1L, 6. 2L, 6. 4L engines. It's designed to fit with the stock intake manifold, exhaust manifold, valve cover, rockers, spark plugs and accessories, as well as Hellcat components. this cylinder head have been machined to be used on either the driver or passenger side of the block. They are cast from A356 aluminum and heat treated to T6