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Competition Cams

Competition Cams 11-601-4 Mutha Thumpr Cam BBC 287TH7 Rough Idle

Part # COM11-601-4 Be the first to write a review

Thumpr 235/249 Hydraulic Flat Cam Compatible with Chevrolet Big Block 396-454

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Competition Cams 11-601-4 Mutha Thumpr Cam BBC 287TH7 Rough Idle

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  • Mutha Thumpr Hydraulic Flat Tappet Camshaft
  • Fits 396-454 cu.in. big block Chevrolet V8s
  • RPM Range: 2,000 to 5,900 rpm
  • Duration @ .050" : 287/304 (int/exh)
  • Ideal for high performance street/strip use, needs 9:1 compression,
  • 2400+ stall converter, intake, gears, and headers, rough idle.
  • Cannot be used with stock valve springs.

Features:

  • Great sound (early exhaust opening and more overlap)
  • Great power (new lobe designs give great area and air flow)
  • Great mid-range response (early intake closing traps more air)
  • Minimal engine vacuum - requires mods for any vacuum accessories such as power brakes
  • Designed for use only with valve train upgrades including COMP Cams® Beehive™ Valve Springs and roller rockers
  • Works best with looser converters, more rear end gear and other performance engine modifications
Advertised Exhaust Duration304
Advertised Intake Duration287
Brand Competition Cams
Camshaft StyleHydraulic Flat Tappet
Emission Code4
Exhaust Duration (at .050 inch Lift)249
Exhaust Valve Lift(w/ Factory Rocker Arm Ratio)0.495
Intake Duration (at .050 inch Lift)235
Intake Valve Lift (w/ Factory Rocker Arm Ratio)0.51
Lobe Separation (degrees)107
Operating RPM Range2000-5900
Product TypeCamshafts
UPC036584176367
Manufacturer Part Number11-601-4
Part NumberCOM11-601-4
4

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

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