Compstar BB Chevy 540 555 565 Balanced Rotating Assembly, 11:3 Diamond Pistons

Callies Compstar Big Block Chevy rotating assembly kits offer quality and reliability you can count on. Featuring fully counterweighted forged crankshafts, H beam connecting rods with ARPL19 rod bolts, forged pistons, file fit pistons rings, performance bearings, these kits are designed to make horsepower. Kit option upgrades are recommended for extreme engine builds. Higher horsepower applications please contact us for other kit options.

Callies Compstar 4340 Forged Crankshaft, 4.250 Stroke, 2 Piece rear main seal (Gen IV) *Center counter weighted*
Callies Compstar H beam rods, 6.385 Length with ARP L19 Rod Bolts
Diamond 2618 forged +28cc Dome performance pistons (1.280 C/H) .185 wrist pins,
Total Seal performance 1/16 1/16 3/16 piston rings
High performance H series main and rod bearings
Pistons are designed specifically to work with most any conventional open chamber Big Block Chevy cylinder head
Compression ratio w/112cc chamber: 11.9:1
Compression ratio w/118cc chamber: 11.3:1
Compression ratio w/121cc chamber: 10.0:1
Calculated deck Height 9.780" (Short Deck)
*This rotating assembly kit has been Internally balanced in-house by CNC-Motorsports*
Note: Pistons will work with 2.300 / 1.880 valve size