High Performance Chrysler 5.7 Gen III Hemi 400 hp long block crate engines were built in a team effort with Comp Cams. Utilizing ATK remanufactured GEN III 5.7L Hemi engines; they upgraded the camshaft, springs, and pushrods to produce reliable 400+ hp.

Features typically include:

* Seasoned OE Gen III Hemi block
* OE reground crankshaft
* OE reconditioned connecting rods
* Hypereutectic pistons
* Chromoly piston rings
* Hydraulic roller camshaft
* Aluminum cylinder heads
* OE shaft mount rocker arms