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
264/260 Duration, 10.70mm/10.20mm Lift. Street, strip or circuit racing camshafts, ideal for engines in the 300-500hp range. Suits up to 30lb boost and 8000 RPM
272/268 duration, 11.30mm/10.50mm Lift. Racing camshafts to suit well optimised competition engines in the 500-700hp range. Best used with larger volume intake manifold and suits up to 30lb boost and 8000 RPM
280/278 Duration, 11.55mm/11.00mm Lift. Drag racing camshafts to suit high HP. Requires some head clearancing to fit. Requires larger volume intake manifold. Suits up to 40lb boost and 9000 RPM