Specifications Bore 103.2mm Stroke 104.1mm 11.9:1 compression GM LC8 cylinder heads, severe duty springs and chrome moly push rods Forged crankshaft, rods, moly coated pistons and high tension rings Severe duty oiling system  Custom camshaft, profile specifically for natural gas Torque to spec fasteners Integrated engine oil cooler Engine harness with GM E-38 processor A complete drop in package with OBD functionality   

Gasoline or Natural Gas (CNG) 645 Horsepower 9.45:1 575 Foot Pounds Torque Supercharged 2.3L Crazy Diamond TVS 6-bolt CNC Ported Cylinder Heads Revised Camshaft Profile .575/588 Lift Aluminum Roller Rocker Arms GREAT all-around performer (1500-6400 RPM) Slightly Rough Idle Remote Diagnostics Compatible Integrated 3-Wire Hookup Plug & Go Harness Current Generation Processor, OBD Compatible Engine ECM and Wire Harness INCLUDED In Price!! Customizable with Paint and Billet Accessories   Base Price: $19,200.00 Options: Billet Drive Accessories A/C, Alt & PS Pump: $2,649.00

The Nail Biter 6.2L Gasoline or CNG 515 Horsepower 11.0:1 490 Foot pounds torque Revised camshaft profile .620 lift Aluminum roller rocker arms Great all around power (1500 to 6400 rpm) Slightly rough idle Active Fuel Management (AFM) option Remote diagnostics compatible Integrated 3 wire hookup Plug and Go harness Engine ECM and wire harness included in price! Current generation processor, OBD compatible Customizable with paint and billet accessories Base Price: $9600.00 Options: CNC ported heads installed $1750.00Billet drive accessories A/C, Alt and PS Pump: $2,649.00

The Cruzer 5.3L Gasoline or CNG 325-400 Horsepower 10.87:1 350-400 Foot pounds torque Revised camshaft profile Aluminum roller rocker arms Great low end power (Idle to 5900 rpm) Smooth to slightly rough idle Active Fuel Management (AFM) option Remote diagnostics compatible Integrated 3 wire hookup Plug and Go harness Current generation processor, OBD compatible Engine ECM and wire harness included in price! Customizable with paint and billet accessories Base Price: $6950.00 Options: CNC ported heads installed: $1750.00     LS3 style intake free W/ported head option Billet drive accessories A/C, Alt and PS Pump: $2,649.00

Gasoline - 100 Octane Minimum 780-820 Horsepower 10.65:1 690-765 Foot Pounds Torque Supercharged 2.3L Crazy Diamond TVS 6-bolt CNC Ported Cylinder Heads over 350 CFM Revised Camshaft Profile .700 Lift LSX 6-bolt Block 7.4L Aluminum Roller Rocker Arms INCREDIBLE Power (2500-6900 RPM) Very rough Idle Integrated 3-Wire Hookup Plug & Go Harness Engine ECM and Wire Harness INCLUDED In Price!! Customizable with Paint and Billet Accessories 　 Base Price: $26,700.00 Options: Billet Drive Accessories A/C, Alt & PS Pump: $2,649.00