Callies BB Chevy 4340 Forged Compstar Crank 4.250 Stroke 42087 5/16 in 12 Point Head

5/16 in 12 Point Head

This Eliminator Double Adjustable drag shock features our BNC compression to take the "bounce" out of wheel-standers and has extra-stiff rebound to slow front end rise on high hp applications

13/16 in 36 Spline to 3/4 in Double D

Inserts restrict air/fuel entry and reduce power slightly to prevent wheel spin and range in size from 0

1975-1979 Chevrolet P10

Callies BB Chevy 4340 Forged Compstar Crank 4.250 Stroke 42087 5/16 in 12 Point HeadProduct Description: Crankshaft Compstar 4. 250 in Stroke Internal Balance Forged Steel 2 Piece Seal Big Block Chevy Sold Individually Callies Performance Products began manufacturing high performance crankshafts in 1989. With many years of engineering and employee experience, Callies has grown to be the industry leader for innovative product design. Callies Performance Products takes pride in staying ahead of the competition with the latest high tech