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21st Century Muscle Cars Corvette 
427 CID Engine Package
2005-2007 LS2

575 BHP / 550 lbs-ft of torque

Package includes:

• Engine removal, inspection and disassembly
• Block machining and boring for sleeves
• Custom LS7 aluminum block preparation 
• JE forged aluminum pistons
• Callies 4.000" stroke forged steel crankshaft 
• Manley 6.125" fully machined, 4340 forged connecting rods
• Computer balanced rotating assembly
• ARP 8740 premium grade head studs
• Lingenfelter CNC porting and polishing of LS2 cylinder heads 
• Stainless steel 2.100" intake valves
• Stainless steel 1.57" exhaust valves
• Competition Cams double valve springs, titanium retainers, locks & seals 
• Three angle valve job, checking of spring tensions and heights 
• Custom Competition Cams hydraulic roller camshaft 
• High volume oil pump
• Fast composite intake manifold
• Lingenfelter firewall modification kit*
• Properly sized fuel injectors
• Lingenfelter High Flow Air Intake
• Stainless steel long tube headers
• High flow cats and cross over pipes
• Reassembly and blueprinting of the engine
• Professional installation, testing and tuning
• ASP Underdrive Pulley
• Chassis dyno testing after installation
• 21st Century Muscle Cars 2 year / 24,000 mile warranty 

Corvette Package Price - $19,995.00

HD Automatic transmission rebuild        $2,995.00

* Firewall modifications are required to install Fast intake


Some applications may benefit from a higher stall torque converter. Please ask your salesperson for details and prices. 

Normal installation time required: 4-5 weeks with prior notification.

Items on this page are not legal for sale or use on pollution controlled motor vehicles. 

All power figures shown are crankshaft numbers unless otherwise stated.