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Big Mutha' Thumpr 243/257 Hydraulic Flat Cam K-Kit for Chevrolet Small Block 262-400

Big Mutha' Thumpr 243/257 Hydraulic Flat Cam K-Kit for Chevrolet Small Block 262-400

Big Mutha' Thumpr 243/257 Hydraulic Roller Cam and Lifter Kit for Chevrolet Small Block 262-400

Big Mutha' Thumpr 243/257 Hydraulic Roller Cam and Lifter Kit for Chevrolet Small Block 262-400

Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chevrolet Small Block 262-400

$272.95
Big Mutha' Thumpr™ 243/257 Hydraulic Flat Cam for Chevrolet Small Block 262-400. Street/strip, needs 9.5:1 compression, 2800+ stall, intake gears and headers, very rough idle.
In stock
SKU
12-602-4
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More Information
UPC 036584175278
Manufacturer COMP Cams®
Emissions Code
Engine Family Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
RPM Operating Range 2,500-6,400
Cam Type Hydraulic Flat Tappet
Camshaft Series Thumpr
Camshaft Gear Attachment 3-Bolt
Usage Street/Strip
California Proposition 65 WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Advertised Intake Duration 295
Advertised Exhaust Duration 313
Intake Duration at .050 Inch Lift 243
Exhaust Duration at .050 Inch Lift 257
Intake Valve Lift 0.5
Exhaust Valve Lift 0.486
Lobe Separation 107
Valve Timing Lift 0.006
Exhaust Close ATDC 49
Intake Open BTDC 44
Exhaust Open BBDC 84
Intake Close ABDC 71
Lifter Style Hydraulic Flat Tappet
12-602-4-camshaft cs 295t h-107 bmt thumpr (219.89 kB)
Recommended Components
Component Part Number
Break-In Lube 159
Valve Seals 503-16
Valve Locks 611-16
Steel Retainers 740-16
Valve Springs 986-16
Valve Springs 26986-16
Steel Retainers 795-16
Lifter Kit 812-16
Lifter Kit 858-16
Timing Set 2100
Rocker Arms 1412-16
Timing Set 3100
CL-Kit Upgrade CL12-602-4
Cam and Lifter and Gear Drive Upgrade GK12-602-4
K-Kit Upgrade K12-602-4
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