Callies Apex Series Crankshaft - 4.000 in Stroke - Internal Balance - 58X Reluctor - Forged - 1-Piece Seal - GM LS-Series 75301 This all new rugged BBK

This all new rugged BBK header design is constructed with 1-3/4” CNC Mandrel-Bent tubing and solid 3/8” laser cut exhaust flanges

Ford: Maverick 70 - 74 4

Advanced phenolic compounds are specially formulated to reduce heat conductivity 10 times greater than aluminum

The shim kit comes with three different thickness aluminum shims

Callies Apex Series Crankshaft - 4.000 in Stroke - Internal Balance - 58X Reluctor - Forged - 1-Piece Seal - GM LS-Series 75301 This all new rugged BBKProduct Description: Crankshaft Apex Series 4. 000 in Stroke Internal Balance 58X Reluctor Forged Steel 1 Piece Seal GM LS Series 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