Mechanical Flat Tappet

Chevrolet - 173 60° (2.8L) & 189 (3.1L)
Performance level 3 - Compu-Pro - Extended rpm range with emphasis on upper bottom to top end power, strong mid-range.
INT/EXH - Dur @ .050” Lift: 212°/216° RR: 1.5/1.5 Gross Lift: .420”/.423” LSA: 112° RPM: 2200 to 5500 Redline: 6000 Learn More

Chevrolet - 173 60° (2.8L) & 189 (3.1L)
Performance level 4 - Compu-Pro - Hot street/strip profile. Strong mid to top end torque and horsepower.
INT/EXH - Dur @ .050” Lift: 236°/242° RR: 1.5/1.5 Gross Lift: .449”/.458” LSA: 110° RPM: 2500 to 6500 Redline: 7000 Learn More

Chevrolet - 173 60° (2.8L) & 189 (3.1L)
Performance level 5 - Compu-Pro - Fantastic top end profile with plenty of horsepower.
INT/EXH - Dur @ .050” Lift: 248°/250° RR: 1.5/1.5 Gross Lift: .470”/.479” LSA: 108° RPM: 3000 to 6500 Redline: 7000 Learn More