Standard Base Circle

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 4 - EFI, Forced Induction & NOS - High stall, heavy car, low gears.
INT/EXH - Dur @ .050” Lift: 248°/254° RR: 1.5/1.5 Gross Lift: .560”/.587” LSA: 114° RPM: 3500 to 7500 Redline: 8000 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 4 - EFI, Forced Induction & NOS - Great 9:1, 355 cid, mid-range.
INT/EXH - Dur @ .050” Lift: 247°/255° RR: 1.5/1.5 Gross Lift: .548”/.573” LSA: 114° RPM: 3000 to 7000 Redline: 7500 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 4 - EFI, Forced Induction & NOS - Strip Special - Easy on train. Excellent with 1.6 rockers (int).
INT/EXH - Dur @ .050” Lift: 254°/262° RR: 1.5/1.5 Gross Lift: .587”/.612” LSA: 114° RPM: to Redline: Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - EFI, Forced Induction & NOS - Super Stock & Bracket classes. High rocker ratio recommended.
INT/EXH - Dur @ .050” Lift: 262°/270° RR: 1.5/1.5 Gross Lift: .612”/.638” LSA: 114° RPM: to Redline: Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - EFI, Forced Induction & NOS - 2 carbs, high stall or 4-speed. Awesome top end cam!
INT/EXH - Dur @ .050” Lift: 270°/278° RR: 1.5/1.5 Gross Lift: .638”/.663” LSA: 114° RPM: to Redline: Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - EFI, Forced Induction & NOS - Big engine, injected/carb, comp.
INT/EXH - Dur @ .050” Lift: 278°/284° RR: 1.5/1.5 Gross Lift: .663”/.689” LSA: 114° RPM: 5500 to 8500 Redline: 9000 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - EFI, Forced Induction & NOS - Major top end power.
INT/EXH - Dur @ .050” Lift: 284°/292° RR: 1.5/1.5 Gross Lift: .689”/.713” LSA: 114° RPM: 5600 to 8500 Redline: 9000 Learn More