Looking for an engine that will take you over the 1000hp mark without praying to the Horsepower gods that it stays together before every pass? Well look no further, our BoostPrep line of engines is exactly what you're looking for.


BoostPrep LS3/LSA/LS9


Bore: 4.065"

Stroke: 3.622"

Connecting Rod Length: 6.125"

Displacement: 6.2L / 376c.i.

Piston Volume: -2.0cc flat tops with valve reliefs or -12.3cc dish with valve reliefs

Compression Ratio:

10.5:1 with 68cc(LS3 Heads with -2.0cc flat top pistons)

9.5:1 with 68cc(LS3 Heads with -12.3cc dish pistons)


Horsepower Rating: Up to 1100whp


Engine Block: New OEM LS3 6.2L Aluminum Block

Crankshaft: New OEM Gen 4 58x OEM Crankshaft

Pistons: Diamond Racing Forged Pistons

Connecting Rods: Callies Compstar H-Beam Connecting rods w/ ARP rod bolts

Main Fasteners: ARP Main Studs

Main Bearings: King XP-Series Race Bearings

Rod Bearings: King XP-Series Race Bearings

Cam Bearings: Durabond one piece bearings


BoostPrep LS3/LSA Shortblock