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Technical Articles for Part Number HRS-120205-12
Howards Cams Hydraulic Roller Camshafts
Camshaft, Hydraulic Roller Tappet, Advertised Duration 286/298, Lift .634/.634, Chevy, Big Block, Each
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Estimated Ship Date: Dec 29, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
120205-12
Part Type:
Product Line:
Summit Racing Part Number:
HRS-120205-12
UPC:
840793105076
Cam Style:
Hydraulic roller, Retro-fit
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
Fair idle, aggressive street. Big midrange torque, 9.5:1+ compression, 2,500+ stall.
Basic Operating RPM Range:
2,500-6,300
Intake Duration at 050 inch Lift:
233
Exhaust Duration at 050 inch Lift:
245
Duration at 050 inch Lift:
233 int./245 exh.
Advertised Intake Duration:
286
Advertised Exhaust Duration:
298
Advertised Duration:
286 int./298 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.634 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.634 in.
Valve Lift with Factory Rocker Arm Ratio:
0.634 int./0.634 exh.
Lobe Separation (degrees):
112
Camshaft Gear Attachment:
3-bolt
Remanufactured:
No
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Quantity:
Sold individually.
Notes:
Retrofit roller cam for engines that did not originally come with a roller cam.
Howards Cams Hydraulic Roller Camshafts
Howards Cams hydraulic roller camshafts are offered in a wide variety of profiles, from mild to wild. These units are precision-ground from race-quality cores, in-house, on dedicated cam-grinding machines. Each Howards Cams hydraulic roller camshaft is manufactured to the highest quality standards. Order the model designed for your vehicle and engine application.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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