COMP Cams 11-600-8 Thumpr 227/241 Hydraulic Roller Cam for Chevrolet Big Block 396-454

Delivering 0.547 inch intake and 0.53 inch exhaust valve lift, the COMP Cams 11-600-8 Thumpr is a hydraulic roller camshaft for Chevrolet 396-454 cubic inch 8-cylinder street performance engines. The 227-degree intake and 241-degree exhaust duration at.050 inch lift produces a choppy, thumping idle characteristic. The camshaft operates in the 1,900 to 5,500 RPM range and is made from austempered ductile iron with 3-bolt gear attachment.

• Camshaft Series: Thumpr
• Cam Type: Hydraulic Roller
• Lifter Type: Hydraulic Roller
• Usage: Street/Performance
• Grind Number: 283THR7
• Camshaft Material: Austempered Ductile Iron
• Camshaft Gear Attachment: 3-Bolt
• Basic Operating RPM Range: 1,900-5,500 RPM
• Intake Duration at.050 Inch Lift: 227 deg
• Exhaust Duration at.050 inch Lift: 241 deg
• Advertised Intake Duration: 283 deg
• Advertised Exhaust Duration: 303 deg
• Intake Valve Lift: 0.547 IN
• Exhaust Valve Lift: 0.53 IN
• Lobe Separation: 107 deg
• Lifters Included: No
• Valve Springs Required: Yes
• Assembly Lubricant Included: No
• Engine Family: Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)
• Cam, Lifter and Gear Drive Upgrade: GK11-600-8
• Cam and Lifter Kit Upgrade: CL11-600-8
• K-Kit Upgrade: K11-600-8
• C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.
• C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: Yes, but must be a race/competition only vehicle.
• C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?: Yes, but must meet tailpipe emission standards for year of vehicle.
• C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.