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Part number: 20-721-9
Competitor Pricing
Product Details
Comp Cams 20-721-9 Drag Race Camshaft
Products specifications
Advertised Duration 307 int./310 exh.
Advertised Exhaust Duration 310
Advertised Intake Duration 307
Basic Operating RPM Range 5,000-8,000
Cam Style Mechanical roller tappet
Computer-Controlled Compatible No
Duration at 050 inch Lift 274 int./279 exh.
Exhaust Duration at 050 inch Lift 279
Exhaust Valve Lash 0.028 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.665 in.
Grind Number CRS 307-R6
Intake Duration at 050 inch Lift 274
Intake Valve Lash 0.026 in.
Intake Valve Lift with Factory Rocker Arm Ratio 0.693 in.
Lobe Separation (degrees) 106
Quantity Sold individually.
Valve Lift with Factory Rocker Arm Ratio 0.693 int./0.665 exh. lift
Valve Springs Required Yes
Title 20-721-9 CamShaft, CRS 307-R6
Engine Make/Size Chevy Big Block (396-454)
RPM Range 5000-13000
Usage Strip
Exh. Duration @ .050 in. (Deg) 279
Exh. Duration Advertised (Deg) 310
Exhaust Valve Lift (in.) 0.645
Int. Duration @ .050 in. (Deg) 274
Int. Duration Advertised (Deg) 307
Intake Valve Lift (in.) 0.693
Lifter Type Mechanical Roller
  • Drag Race Xtreme RX Camshaft
  • 1 Year Limited Warranty
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Best price around. Great Communication. Fast shipping. What else can I ask for?
I have already purchased again from them.
Best pricing I found anywhere on the part I needed, quick shipping, no hassle. Definitely going to be a repeat customer.
very fast. glad they have paypal to where you dont have to setup an account! great website!! :)
Very fast shipping, lowest prices on the web.
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