Engine sheet in pictures. 9.7-9.8-1 compression. These LS engines are awesome with boost. Engine sheet in pictures. Stock with 12 psi will get 594 hp/588 torque and this has an aftermarket cam and you can increase the psi. BTR racing full trunnion upgraded rockers, balanced engine, ARP head studs, turbo 226/230 113 .600 cam with Pac racing springs, serviced and milled heads by cylinder head service, swap oil pan, melling oil pump, ARP rod bolts, gen 4 rods, Wiseco forged pro LS 7cc dish pistons, total seal nos/turbo steel piston rings not moly, German MLS head gaskets, non dod and non afm, and all gaskets and seals are Fel-Pro. You're getting a good deal!