Best average torque & HP of any L99 cam without requiring looser converter. Valve train stable to 7400 RPM w/ CK & MK Kits. For engines with VVT and no AFM, such as L9H. For 2008-2015 GM LS GEN IV Single Bolt w/ VVT (12606358) and w/o AFM 8 Cylinder. Advertised Exhaust Duration: 293. Lobe Separation: 111.5. Intake Valve Lift: 0.614. Exhaust Valve Lift: 0.606. Valve Springs Required: Yes. Camshaft Gear Attachment: 1-Bolt. Camshaft Material: Billet Steel. Lifter Style: Hydraulic Roller. Stage: 1. Recommended Upgraded Stock Rocker Arms: 1478-16. Recommended Max-Lift BSR Shaft Rocker System: 1982-16. Recommended Cam Install Kit: 5623. Camshaft Series: Low Shock Technology. Cam Type: Hydraulic Roller.