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Part number: 12-990-9
Product Details
Comp Cams 12-990-9 Oval Track .900 in. Base Circle Camshaft
Products specifications
Advertised Duration 288 int./296 exh.
Advertised Exhaust Duration 296
Advertised Intake Duration 288
Basic Operating RPM Range 3,200-6,200
Cam Style Mechanical roller tappet
Computer-Controlled Compatible No
Duration at 050 inch Lift 252 int./258 exh.
Exhaust Duration at 050 inch Lift 258
Exhaust Valve Lash 0.022 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.630 in.
Grind Number 288AR-6
Intake Duration at 050 inch Lift 252
Intake Valve Lash 0.020 in.
Intake Valve Lift with Factory Rocker Arm Ratio 0.630 in.
Lobe Separation (degrees) 106
Notes Requires upgraded gear, thrust button, and wear plate.
Quantity Sold individually.
Valve Lift with Factory Rocker Arm Ratio 0.630 int./0.630 exh. lift
Valve Springs Required Yes
Title 12-990-9 CamShaft, CS 288A-R6 .900 BC
Engine Make/Size Chevy Small Block (262-400)
RPM Range 3000-9000
Usage Strip
Exh. Duration @ .050 in. (Deg) 258
Exh. Duration Advertised (Deg) 296-6
Exhaust Valve Lift (in.) 0.63
Int. Duration @ .050 in. (Deg) 252
Int. Duration Advertised (Deg) 288-5
Intake Valve Lift (in.) 0.630
Lifter Type Mechanical Roller
  • Oval Track Camshaft
  • 1 Year Limited Warranty
Reviews
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P
Ordered a CAI kit and Autoplicity had the lowest price.  They're website didn't correctly match my vehicle to the product and it took a few days to ship.  They're support was friendly and quick when I emailed them about the delay.
M
Great customer service, item shipped quickly. Very satisfied.
C
Great site.  Provided needed technical specs.  Shipped promptly. Although I had to ask for the tacking number, it was not emailed, one was provided promptly upon request.
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