280/278 Duration, 11.55mm/11.00mm Lift. High lift racing camshafts, requires head modifications to fit. Best with larger intake manifold. Suits up to 40lb boost and 9000 RPM
256/260 Duration, 9.55mm/9.50mm Lift. Restrictor plate rally car or street performance camshafts for engines with stock or small turbocharger. Suits up to 30lb boost and 8000 RPM