Mechanical Flat Tappet

Oldsmobile - 260, 307 (5.0L,) 350 (5.7L), 400, 403, 425 & 455 (39° bank angle)
Performance level 3 - Compu-Pro - High revving, super mid to top end power.
INT/EXH - Dur @ .050” Lift: 238°/242° RR: 1.6/1.6 Gross Lift: .526”/.539” LSA: 110° RPM: 3000 to 7000 Redline: 7500 Learn More

Oldsmobile - 260, 307 (5.0L,) 350 (5.7L), 400, 403, 425 & 455 (39° bank angle)
Performance level 4 - Compu-Pro - Super torque with explosive mid-range power.
INT/EXH - Dur @ .050” Lift: 248°/255° RR: 1.6/1.6 Gross Lift: .552”/.568” LSA: 108° RPM: 3500 to 7500 Redline: 8000 Learn More

Oldsmobile - 260, 307 (5.0L,) 350 (5.7L), 400, 403, 425 & 455 (39° bank angle)
Performance level 5 - Compu-Pro - Upper mid-range and top end profile for added power above 7000 rpm.
INT/EXH - Dur @ .050” Lift: 260°/268° RR: 1.6/1.6 Gross Lift: .584”/.601” LSA: 108° RPM: 4000 to 8000 Redline: 8500 Learn More