Butler/Comp SP Billet Hydraulic Roller Cam & Lifter Kit (HR) — 288/294° Adv / 236/242° @.050" / .521/.540" Lift / 112 LSA

Butler has proven results with Comp Cams. These are custom grinds we stock on the shelf, so you don't have to chase down the right custom grind for your Pontiac — these are the same cams we run in our own proven combinations. Ground on a billet core for hydraulic-roller valvetrains.

Spec (HR, std journals): 288/294° advertised, 236/242° @ .050", .521/.540" lift, 112 LSA.

Duration and lift shown with 1.5:1 rockers; actual valve lift increases with higher-ratio rockers (e.g., 1.65:1). Std journals.

Cam + Lifter Kit

This kit adds your choice of hydraulic-roller lifters to the cam:

• Morel 5884R
• Johnson 2112-OPR
• Comp Evolution

What Is Lobe-Separation Angle (LSA)?

LSA is the distance in cam degrees between the intake and exhaust lobe centerlines. Tighter LSA gives a rougher idle and less vacuum but more midrange and peak power; wider LSA idles smoother and makes more vacuum with a broader top end.

Recommended install centerline: 110 LSA → 106 · 112 LSA → 108 · 113 LSA → 109 · 114 LSA → 110 (intake lobe centerline).