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Technical Articles for Part Number HRS-514155-10
Howards Cams 4/7 Swap Camshafts
Camshaft, 4/7 Swap, Hydraulic Roller Tappet, Advertised Duration 286/286, Lift .549/.549, Oldsmobile, V8, Each
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Estimated Ship Date: Dec 28, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
514155-10
Part Type:
Product Line:
Summit Racing Part Number:
HRS-514155-10
UPC:
840793114009
Cam Style:
Hydraulic roller, Retro-fit
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
Choppy idle, strong low and midrange performance. 2,500+ stall.
Basic Operating RPM Range:
2,000-5,800
Intake Duration at 050 inch Lift:
233
Exhaust Duration at 050 inch Lift:
233
Duration at 050 inch Lift:
233 int./233 exh.
Advertised Intake Duration:
286
Advertised Exhaust Duration:
286
Advertised Duration:
286 int./286 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.549 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.549 in.
Valve Lift with Factory Rocker Arm Ratio:
0.549 int./0.549 exh.
Lobe Separation (degrees):
110
Remanufactured:
No
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Quantity:
Sold individually.
Notes:
4/7 swap firing order.
Howards Cams 4/7 Swap Camshafts
Howards Cams 4/7 swap camshafts are ground in-house, so each cam is manufactured on precision cam grinding machines—not re-boxed like other companies. These 4 and 7 swap firing order cams feature a high-grade race quality core that changes the engine's firing order pattern to create more power. Howards Cams packages and ships most of their cams in a unique, reusable, high-impact-plastic case to ensure that your camshaft reaches you in nothing less than perfect condition. Get the competition 4/7 swap camshaft from Howard Cams designed for your application today!
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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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