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Technical Articles for Part Number HRS-721743-08
Howards Cams Steel Billet Mechanical Roller Camshafts 721743-08
Part Number: HRS-721743-08
Howards Cams Steel Billet Mechanical Roller Camshafts
Camshaft, Mechanical Roller Tappet, Advertised Duration 285/291, Lift .600/.585, Chrysler, Big Block, Each
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Estimated Ship Date: Dec 31, 2026 Would you rather pick it up?
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Overview
Brand:
Manufacturer's Part Number:
721743-08
Part Type:
Product Line:
Summit Racing Part Number:
HRS-721743-08
UPC:
840793115518
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
Rough idle, Hot Street/bracket. Strong midrange horsepower.
Basic Operating RPM Range:
3,000-6,400
Intake Duration at 050 inch Lift:
253
Exhaust Duration at 050 inch Lift:
259
Duration at 050 inch Lift:
253 int./259 exh.
Advertised Intake Duration:
285
Advertised Exhaust Duration:
291
Advertised Duration:
285 int./291 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.600 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.585 in.
Valve Lift with Factory Rocker Arm Ratio:
0.600 int./0.585 exh.
Lobe Separation (degrees):
108
Camshaft Gear Attachment:
3-bolt
Intake Valve Lash:
0.022 in.
Exhaust Valve Lash:
0.022 in.
Remanufactured:
No
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Quantity:
Sold individually.
Howards Cams Steel Billet Mechanical Roller Camshafts
Howards Cams steel billet mechanical roller camshafts are serious cams for serious performance. Cut from billet steel these high-grade, race-quality mechanical roller cams from Howards are ground on precision equipment to ensure awesome performance. Mechanical roller cams offer aggressive power for all-out competition. They're billet, they're Howards, and they're serious-- mechanical roller camshafts!
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Some parts are not legal for use in California or other states with similar laws / regulations
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