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Technical Articles for Part Number HRS-124133-08
Howards Cams 4/7 Swap Camshafts
Camshaft, 4/7 Swap, Mechanical Roller Tappet, Advertised Duration 293/301, Lift .680/.680, Chevy, Big Block, Each
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Estimated Ship Date: Dec 31, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
124133-08
Part Type:
Product Line:
Summit Racing Part Number:
HRS-124133-08
UPC:
840793106981
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Drag race
Camshaft Manufacturers Description:
Nice bracket cam, lopey idle, needs higher stall and lower gear.
Basic Operating RPM Range:
3,400-7,200
Intake Duration at 050 inch Lift:
261
Exhaust Duration at 050 inch Lift:
269
Duration at 050 inch Lift:
261 int./269 exh.
Advertised Intake Duration:
293
Advertised Exhaust Duration:
301
Advertised Duration:
293 int./301 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.680 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.680 in.
Valve Lift with Factory Rocker Arm Ratio:
0.680 int./0.680 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.
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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Some parts are not legal for use in California or other states with similar laws / regulations
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