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.


LS BoostPrep 6.0L Longblock


Bore: 4.000"

Stroke: 3.622"

Connecting Rod Length: 6.125"

Displacement: 6.0L / 366c.i.

Piston Volume: -2.0cc flat tops with valve reliefs or -13.7cc dish with valve refliefs

Compression Ratio: 

10.3:1 with 68cc(LS3/LSA Heads with -2.0cc flat top pistons)

9.0:1 with 68cc(LS3/LSA Heads with -13.7cc dish pistons)


Horsepower Rating: Up to 1100whp


Engine Block: New OEM Gen 4 6.0L Iron 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


Cylinder Heads: Strictly Spec'd CNC Ported LSA Heads

Valves: 2.165" intake / 1.590" exhaust

Valve Springs: .660" Lift Dual Valve Springs w/ Titanium retainers

Camshaft: Application Specific Spec'd Camshaft

Timing Chain: Katech C5-R Timing Chain

Lifters: OE Replacement LS7 Lifters

Push Rods: 5/16 Diameter Chromoly Pushrods

Rocker Arms: New LS3 Rocker Arms w/ trunnion upgrade

Head Fasteners: GM Head Bolts or Optional ARP Head Studs

Head Gaskets: GM MLS Head Gaskets

Oil Pump: Melling High Pressure Oil Pump


BoostPrep 6.0L Longblock