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Part number: 12-998-9
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Product Details
Comp Cams 12-998-9 Specialty Camshaft Mechanical Roller Camshaft
Products specifications
Advertised Duration 300 int./308 exh.
Advertised Exhaust Duration 308
Advertised Intake Duration 300
Basic Operating RPM Range 3,200-7,200
Cam Style Mechanical roller tappet
Camshaft Gear Attachment 3-bolt
Computer-Controlled Compatible No
Duration at 050 inch Lift 264 int./270 exh.
Exhaust Duration at 050 inch Lift 270
Exhaust Valve Lash 0.022 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.630 in.
Intake Duration at 050 inch Lift 264
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 12-998-9 CamShaft, CS 300B-R6 .900 BC
Engine Make/Size Chevy Small Block (262-400)
Usage Street/Strip
RPM Range Custom
Exh. Duration @ .050 in. (Deg) 270
Exh. Duration Advertised (Deg) 308-6
Exhaust Valve Lift (in.) 0.63
Int. Duration @ .050 in. (Deg) 264
Int. Duration Advertised (Deg) 300-5
Intake Valve Lift (in.) 0.630
Lifter Type Mechanical Roller
  • Specialty Camshaft
  • 1 Year Limited Warranty
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Awsome service and prices,Thanks alot
Easy ordering
lowest price I could find ANYWHERE. Website needs some work (login screen appears to be asking you to login again after you enter account info).
Very good company! Shipped out product very fast!!! I can say i will use them again
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