CHEVY LS7 427ci 650hp COMPLETE ENGINE

BLOCK SPECIFICATIONS

Block:

• Dart SHP Pro Cast Iron Block (optional upgrade: Aluminum Dart or Concept Performance LSr Blocks)

• Precision resurfaced to match pistons

• Bored to 4.125”

• Performance honed with torque plates for accuracy

• New Durabond cam bearings installed

• Line honed with optimized oil clearances

• Secured with ARP main studs

Pistons:

• Mahle forged pistons featuring anti-friction coating for durability and performance

Bearings:

• King H-Series main and rod bearings

Lifters:

• Johnson OE Hydraulic Roller lifters

Covers:

• Oil Pan (Camaro, Corvette, GTO, Truck, or LS Swap options available)

• GM Timing Cover

• GM Rear Cover

• GM Lifter Valley Cover

• GM Valve Covers (custom options available)

Damper:

• Powerbond SFI-rated damper

• ARP damper bolt

Crankshaft:

• Callies Comp Star 4340 forged steel crankshaft

• 4.000” stroke

• Choice of 24x or 58x reluctor wheel (billet 24X upgrade: +$150)

• Internally balanced, front and rear

Connecting Rods:

• Callies Comp Star H-Beam forged steel rods, 6.125” length

Rings:

• Mahle Plasma Moly piston rings

Camshaft:

• Comp Cams hydraulic roller camshaft

Timing Set:

• Cloyes billet roller timing set with hex adjust

Oil System:

• Melling Select Performance high-volume oil pump

• GM Pick-Up Tube

• GM Windage Tray

Gaskets:

• GM MLS head gaskets

• GM cover gaskets

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CYLINDER HEAD SPECIFICATIONS

Type:

• Golen aftermarket LS aluminum CNC-ported heads

• Three-angle performance valve job

Valves:

• Intake: Rev Stainless Steel 2.16”

• Exhaust: Rev Stainless Steel 1.6”

Head Bolts:

• ARP Performance Series

Intake System:

• FAST LSxR 102mm intake manifold

• 102mm billet throttle body (DBW options available)

• Bosch 52lb Uscar EV6 fuel injectors

• GM factory fuel rails or black billet fuel rails

Combustion Chamber:

• 70cc

Flow Rate:

• 380 CFM @ .600” lift

Valve Spring Kit:

• BTR double valve springs

• Lightweight titanium retainers and hardened locks

Rocker Arms:

• GM factory 1.7 ratio with BTR trunnion upgrade kit installed

Pushrods:

• BTR 5/16” .083” wall hardened pushrods

Ignition System:

• NGK spark plugs

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DYNO TESTING & QUALITY ASSURANCE

• Engine run through full break-in and power testing

• Two oil changes using Joe Gibbs break-in oil

• Includes dyno graphs for horsepower and torque, plus a YouTube dyno video

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CUSTOMIZATION & WARRANTY
Every Golen engine can be built to your specific requirements—simply let us know your desired specs.
Each engine comes standard with a one-year, no mileage limit warranty, ensuring reliability and peace of mind.

When you purchase a Golen LS HP or Hot Rod Series Street Engine, you’ll receive:

• A full spec sheet listing every component used

• A complete setup guide

• Phone tech support for installation assistance

Golen Engine Performance delivers precision-built powerplants designed for long-lasting street and track performance — confidently backed by our unmatched One-Year No Mileage Limit Warranty.