PSLS4271CT LS3 Crate Engine by BluePrint Engines 427CI 625 HP ProSeries Stroker Crate Engine GM LS Style Longblock Aluminum Heads Roller Cam Late Model Drop In Upgrade

HP & Torque: 625 HP / 550 FT LBS
Compression Ratio: 11:1
Aluminum Heads
Hydraulic Roller Cam
Forged Crank
Forged Pistons

BLOCK:
OEM Block Machined in the USA!
6-Bolt Main
4.060" Bored to 4.069
1-Piece Rear Main Seal

ROTATING ASSEMBLY:
New Forged Crankshaft
4.125" stroke
Forged 6.125" connecting Rods
Forged Pistons
Internal

CYLINDER HEADS:
BluePrint Aluminum Cylinder Heads -PS8015
72cc chamber
2.165" intake/1.600" exhaust valves
259cc intake/102cc exhaust runners

CAM SPECS:
Cam Type: Roller
.624 intake .624 exhaust lift
239 intake 255 exhaust duration
@ .050, 114 degree lobe sep.

IGNITION TIMING:
ECM Controlled (not included)

ALSO INCLUDES:
Timing cover
LS3 Intake manifold

WARRANTY:
30 month / 50,000 mile

NOTES:
This engine requires a non-weighted harmonic balancer, and non-weighted flexplate/flywheel.
This engine is specifically designed to replace your existing LS engine - a direct drop in for Gen 4 applications.
Built with a 58x Gen 4 style reluctor and sensors.
Not for use in pollution controlled vehicles.
Recommended Fuel: 91 Octane
BluePrint Engines recommends a 2200+ RPM stall converter