High-lift camshafts for GM LS engines are more the norm than the exception these days. Cams rated around .600 to .625 inches of valve lift are all over the place.

You’ll need a good set of valve springs to run one of those cams. Summit Racing™ Pro LS High-Lift Valve Springs are an inexpensive way to extend the engine’s operating range by around 1000rpm, which is not to be sniffed at. The springs are a drop-in replacement for factory springs and come in sets of sixteen. 

Pro LS Valve Springs, .600″ Max Valve Lift
• 1.290in diameter
• 1.800in installed height at 135lbs seat pressure
• 1.200in max lift at 320lbs open pressure
• 310 lb/ft. spring rate

Pro LS Valve Springs, .630″ Max Valve Lift
• 1.300in diameter
• 1.800in installed height at 140lbs seat pressure
• 1.170in max lift at 350lbs open pressure
• 340 lb/ft. spring rate

More information from www.summitracing.com ENDS.