Designed for serious LS9 enthusiasts looking to push the limits of the factory bottom end, the ZR1 Max Effort Camshaft is intended for use with aftermarket cylinder heads and is best paired with a 2650 supercharger.

This camshaft was developed for customers chasing maximum performance from an OEM LS9 engine combination. We’ve produced over 1,100 wheel horsepower using this camshaft in properly matched setups.

With an operating range of 3,500–7,500 RPM, this grind takes full advantage of the airflow capabilities of a ported 2650, delivering exceptional top-end power while maintaining strong mid-range performance.

Recommended Components:

• Aftermarket cylinder heads
• 2650 supercharger
• PAC-1209X valve springs (required)
• Supporting fuel system and drivetrain upgrades recommended for 1,100+ WHP applications

If you’re looking for a camshaft that extracts everything the factory LS9 platform has to offer, the ZR1 Max Effort Camshaft delivers proven results.