Comp Cams CL51-600-5 Pontiac Thumpr Hydraulic Flat Tappet Camshaft and Lifter Kit

This Comp Cams CL51-600-5 Pontiac Thumpr Hydraulic Flat Tappet Camshaft & Lifter Kit fits 265-455 engines from 1955-1981. Comp designed this cam for high performance street use, and it features a choppy/thumping idle. Lower rear end gears and a 2200+ stall speed torque converter are highly recommended.

Comp Cams CL51-600-5 Pontiac Thumpr Hydraulic Flat Tappet Camshaft & Lifter Kit Specs:

• For 265-455 cubic inch engines from 1955-1981
• Includes Camshaft 51-600-5 and Lifter Set 852-16 (265-301 engines must use Lifter Set 864-16)
• Stock (O.E.) valve springs can NOT be used.
• Basic RPM Range: 2000 to 5800
• Valve Lift Intake: .478
• Valve Lift Exhaust: .465
• Advertised Intake Duration: 279
• Advertised Exhaust Duration: 297
• Intake Duration at .050”: 227
• Exhaust Duration at .050”: 241
• Lobe Separation: 107
• Firing Order: 1-8-4-3-6-5-7-2
• Made in the USA

Note: 265-301 cubic inch engines MUST use Lifter Set 864-16.

Comp Cams designed this Hydraulic Flat Tappet camshaft for street use.

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