Ultra-Action

Chevrolet - 366, 396, 402, 427, 454, 502 & Rodeck
Performance level 5 - Ultra-Action - High torque and midrange profile for bracket and marine applications.
INT/EXH - Dur @ .050” Lift: 256°/266° RR: 1.7/1.7 Gross Lift: .641”/.636” LSA: 107° RPM: 2800 to 6800 Redline: 7200 Learn More

Chevrolet - 366, 396, 402, 427, 454, 502 & Rodeck
Performance level 5 - Ultra-Action - Super competition profile.
INT/EXH - Dur @ .050” Lift: 288°/290° RR: 1.7/1.7 Gross Lift: .777”/.731” LSA: 110° RPM: Varies on valve train, heads, manifold, etc... to Redline: Learn More

Chevrolet - 366, 396, 402, 427, 454, 502 & Rodeck
Performance level 5 - Ultra-Action - Strong mid-range design for bracket and marine use.
INT/EXH - Dur @ .050” Lift: 260°/270° RR: 1.7/1.7 Gross Lift: .651”/.677” LSA: 107° RPM: 3000 to 7000 Redline: 7500 Learn More

Chevrolet - 366, 396, 402, 427, 454, 502 & Rodeck
Performance level 5 - Ultra-Action - Strong mid-range design for bracket and marine use.
INT/EXH - Dur @ .050” Lift: 270°/276° RR: 1.7/1.7 Gross Lift: .678”/.661” LSA: 107° RPM: 4500 to 8000 Redline: 8400 Learn More

Chevrolet - 366, 396, 402, 427, 454, 502 & Rodeck
Performance level 5 - Ultra-Action - Big cid profile for 3⁄8 and 1⁄2 mile oval.
INT/EXH - Dur @ .050” Lift: 284°/288° RR: 1.7/1.7 Gross Lift: .758”/.745” LSA: 108° RPM: 5300 to 8800 Redline: 9000 Learn More

Chevrolet - 366, 396, 402, 427, 454, 502 & Rodeck
Performance level 5 - Ultra-Action - Fast 3⁄8 and 1⁄2 mile oval track grind.
INT/EXH - Dur @ .050” Lift: 276°/280° RR: 1.7/1.7 Gross Lift: .728”/.716” LSA: 108° RPM: 4800 to 8300 Redline: 8700 Learn More

Chevrolet - 366, 396, 402, 427, 454, 502 & Rodeck
Performance level 5 - Ultra-Action - A very radical profile for competition use only.
INT/EXH - Dur @ .050” Lift: 294°/300° RR: 1.7/1.7 Gross Lift: .779”/.717” LSA: 112° RPM: Varies on valve train, heads, manifold, etc... to Redline: Learn More

Chevrolet - 366, 396, 402, 427, 454, 502 & Rodeck
Performance level 5 - Ultra-Action - Extremely radical competition profile.
INT/EXH - Dur @ .050” Lift: 298°/300° RR: 1.7/1.7 Gross Lift: .802”/.784” LSA: 112° RPM: Varies on valve train, heads, manifold, etc... to Redline: Learn More

Chevrolet - 366, 396, 402, 427, 454, 502 & Rodeck
Performance level 5 - Ultra-Action - Super competition profile.
INT/EXH - Dur @ .050” Lift: 286°/292° RR: 1.7/1.7 Gross Lift: .801”/.780” LSA: 110° RPM: Varies on valve train, heads, manifold, etc... to Redline: Learn More