427CI LS 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
Hydraulic Roller Cam
OEM Block Machined in the USA!
4.060" Bored to 4.069
1-Piece Rear Main Seal
- New Forged Crankshaft
Forged 6.125" connecting Rods
- BluePrint Aluminum Cylinder Heads -PS8015
2.165" intake/1.600" exhaust valves
259cc intake/102cc exhaust runners
- Cam Type: Roller
.624 intake .624 exhaust lift
239 intake 255 exhaust duration
@ .050, 114 degree lobe sep.
- ECM Controlled (not included - customer must reprogram)
- Timing cover
LS3 Intake manifold
- 30 month / 50,000 mile
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
- Because this engine does not ship with an oil pan, we do not dyno test prior to the engine being shipped.
PSLS4271CT Recommended Parts