Mutha' Thumpr 235/249 Hydraulic Roller for Pontiac 265-455

Mutha' Thumpr™ 235/249 Hydraulic Roller for Pontiac 265-455. High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle. Distributor gear upgrade required.
Grind Number: 291THR7
Engine Family: Pontiac 265-455 c.i. 8 Cyl. (1955-1981)
RPM Operating Range: 2,000-5,800
Cam Type: Hydraulic Roller
Lifter Style: Hydraulic Roller
Camshaft Series: Thumpr
Camshaft Gear Attachment: 1-Bolt
Usage: Street/Strip
Valve Springs Required: Yes
Camshaft Material: Billet Steel
California Proposition 65: WARNING: Cancer and Reproductive Harm
Advertised Intake Duration: 291
Advertised Exhaust Duration: 311
Intake Duration at .050 Inch Lift: 235
Exhaust Duration at .050 Inch Lift: 249
Intake Valve Lift: 0.522
Exhaust Valve Lift: 0.508
Lobe Separation: 107
Assembly Lubricant Included: No
Component Part Number
CL-Kit Upgrade: CL51-601-11
K-Kit Upgrade: k51-601-11