Callies Apex Series Crankshaft - 3.625 in Stroke - Internal Balance - 58X Reluctor - Forged - 1-Piece Seal - GM LS-Series DZZ77019 From the single original Racepak

From the single original Racepak data recorder our line has now grown to include a large selection of unique loggers

Dash Bracket

the longer length allows it to hold more air and oil

Improves Engine Efficiency

5-11 in Clutches

Callies Apex Series Crankshaft - 3.625 in Stroke - Internal Balance - 58X Reluctor - Forged - 1-Piece Seal - GM LS-Series DZZ77019 From the single original RacepakProduct Description: Crankshaft Apex Series 3. 625 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