244/248, .615"/.615" Camshaft With Your Choice of Lobe Separation. 2400-6800 RPM Power Band with a peak around 6500 RPM (depending on engine size); This is an excellent performance camshaft with a rough idle! Custom tuning required THIS CAMSHAFT IS DESIGNED FOR ENGINES LARGER THAN A 346 LS-1! CAMSHAFT DOES NOT HAVE ENOUGH P/V CLEARANCE FOR STOCK ENGINE APPLICATIONS We recommend this camshaft on 400+ cubic inch engines that have aftermarket pistons with valve reliefs. Please give us a call if you have any questions selecting a camshaft for your big cube engine!