Manufacturer's Part Number:
Howards Cams 4/7 Swap Camshafts
Summit Racing Part Number:
Mechanical roller tappet
Basic Operating RPM Range:
Intake Duration at 050 inch Lift:
Exhaust Duration at 050 inch Lift:
Duration at 050 inch Lift:
251 int./257 exh.
Advertised Intake Duration:
Advertised Exhaust Duration:
283 int./289 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
Exhaust Valve Lift with Factory Rocker Arm Ratio:
Valve Lift with Factory Rocker Arm Ratio:
0.640 int./0.640 exh.
Lobe Separation (degrees):
Camshaft Gear Attachment:
Intake Valve Lash:
Exhaust Valve Lash:
Valve Springs Required:
Camshaft Manufacturers Description:
Strong midrange horsepower, rough idle. Oval track and bracket cars.
4/7 swap firing order.
Choose In-store pick-up (OH, GA, NV) on our web site.
Howards Cams 4/7 swap camshafts are ground in house, so each cam is manufactured on precision cam grinding machines--not reboxed like other companies. These 4 and 7 swap firing order cams feature a high-grade race quality core with a 1-8-7-3-6-5-4-2 firing order pattern. What does that mean exactly? It means moving the power stroke for cylinder 4 to where 7 used to be, and vice versa, and you have just changed the engine's firing order pattern to create more power. Howards Cams packages and ships all their cams in a unique, hard, high-impact plastic reusable case to ensure your camshaft reaches you in nothing less than perfect condition. So what are you waiting for? Get your competition 4/7 swap camshaft today from Howard Cams!