Comp Cams 11-601-8 BBC Mutha' Thumpr Retro-Fit Hydraulic Roller Camshaft 291THR7

This Comp Cams 11-601-8 BBC Mutha' Thumpr Retro-Fit Hydraulic Roller Camshaft fits the 396-454 Big Block Chevy from 1967-1996. Comp designed this cam for high performance street/strip use, and it features great low-end torque and a rough idle. A 9.0:1 or higher compression ratio, intake, gears, headers, and a 2600+ stall speed torque converter are highly recommended.

Comp Cams 11-601-8 BBC Mutha' Thumpr Retro-Fit Hydraulic Roller Camshaft Specs:

• For 396-454 cubic inch Big Block Chevy engines from 1967-1996
• Requires thrust button & wear plate
• Must use bronze tip fuel pump pushrod when using high pressure or high-volume pump
• Stock (O.E.) valve springs can NOT be used.
• Basic RPM Range: 2200 to 5800
• Valve Lift Intake: .558
• Valve Lift Exhaust: .542
• Advertised Intake Duration: 291
• Advertised Exhaust Duration: 311
  
• Intake Duration at .050”: 235
• Exhaust Duration at .050”: 249
• Lobe Separation: 107
• Firing Order: 1-8-4-3-6-5-7-2
• Made in the USA

Notes: The 1965-66 396 has an oiling groove in the rear journal. This cam does not, so if you require the oiling groove, please contact us for a special order.

Comp Cams designed this Retro-Fit Hydraulic Roller camshaft for high performance on the street and drag strip.

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