Compstar SB Chevy 415/421 Stroker Kit, Balanced Assembly, CP Pistons 13.5:1 Dome

CNC-Motorsports is please to offer 415/421 Callies Compstar rotating assembly kits. This kits is designed for performance application builds up to 900 horsepower. This kits offer 2618 forged pistons with premium steel gas nitrided piston rings for mild power adders. All kits come Internally balanced and are ready for you to assemble.

Callies Compstar 4340 forged steel crankshaft, 3.875 stroke, 2 piece rear main seal
Callies Compstar 4340 forged steel H beam connecting rods with ARP2000 rod bolts, 6.000 Length
CP-Carrillo Bullet pistons, 2618 forged, standard .150 wrist pins and spirol locks included *fits 23 degree heads* 1.062 C/H
CP Performance gas nitrided file to fit ring set 1.5 x 1.5 x 3.0mm
Race H series main and rod bearings included
Rotating assembly has been fully internally balanced in-house by CNC-Motorsports
Compression Ratio with 64cc: 13.5:1
Compression Ratio with 70cc: 12.4:1
Note: Small Base Circle camshaft required
Compression is figured at 4.125 bore, 0 deck, 4.190 bore gasket, .041 thick