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Comp Cams Hydraulic Roller Cam & Lifters
Big Mutha'Thumpr™ 243/257 Hydraulic Roller Cam and Lifter Kit for Chevy Big Block 396-454. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears, and headers, very rough idle.
Part Type: Camshaft Kits
UPC: 036584153481
Camshaft Use: Street/Strip
Cam Style: Hydraulic Roller, Retro-fit
Basic Operating RPM Range: 2300-6100
Duration at 050" Lift: 243 int./257 exh.
Intake Duration at 050" Lift: 243
Exhaust Duration at 050" Lift: 257
Advertised Duration: 299 int./319 exh.
Advertised Intake Duration: 299
Advertised Exhaust Duration: 319
Valve Lift w/Factory Rocker Arm Ratio: 0.570 int./0.554 exh.
Intake Valve Lift w/Factory Arm Ratio: 0.570"
Exhaust Valve Lift w/Factory Rocker Arm Ratio: 0.554"
Lobe Separation: 107°
Computer-Controlled Compatible: No
Valve Springs Required: Yes
Rocker Arms Included: No
Gaskets Included: No
Pushrods Included: No
Valve Springs Included: No
Retainers Included: No
Locks Included: No
Valve Stem Seals Included: No
Assembly Lubricant Included: No
Timing Chain and Gears Included: No
Camshaft Gear Attachment: 3-Bolt
Lifters Included: Yes
Lifter Style: Hydraulic Roller
Quantity Sold as: A Kit
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