Small Base Circle

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 4 - High Lift - Street/strip applications, rough idle, 2500 stall required.
INT/EXH - Dur @ .050” Lift: 236°/240° RR: 1.5/1.5 Gross Lift: .555”/.559” LSA: 110° RPM: 2400 to 6000 Redline: 6500 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 1 - High Lift - Strong torque, excellent mileage and smooth idle.
INT/EXH - Dur @ .050” Lift: 196°/204° RR: 1.5/1.5 Gross Lift: .465”/.484” LSA: 110° RPM: 1600 to 5200 Redline: 5700 Learn More