5.0L Cams, Exhaust Cutouts, and Leaky Tailshafts Fixes: The Latest Summit Brand Products

Up-cam your 5.0L small block Ford, run exhaust cutouts with no wires or motors, and fix the leaky tailshaft on your GM transmission with these new Summit Brand parts. You’re welcome.

Summit Racing™ 303 Plus Camshafts for Ford 5.0L H.O.
Five-point-oh small blocks never die, they just get upgraded. Made in the USA from American bearing steel billets, our 303 Plus hydraulic roller cams have similar specs to the old Ford Motorsport grinds, but are designed with the latest lobe technology than can take advantage of modern beehive valve spring packages to provide more lift and increased high RPM power.

E303 Plus Camshaft
• Operating Range: 2,500-6,000 RPM
• Duration @ .050: Lift: 220° intake/231° exhaust
• Lift with Factory Rocker Arm Ratio: .550” intake/.540” exhaust
• Lobe Separation: 113°

B303 Plus Camshaft
• Operating Range: 2,800-6,250 RPM
• Duration @ .050: Lift: 224° intake/232° exhaust
• Lift with Factory Rocker Arm Ratio: .550” intake/.540” exhaust
• Lobe Separation: 114°

F303 Plus Camshaft
• Operating Range: 3,000-6,500 RPM
• Duration @ .050: Lift: 226° intake/234° exhaust
• Lift with Factory Rocker Arm Ratio: .550” intake/.540” exhaust
• Lobe Separation: 114°

Summit Racing™ Vacuum-Actuated Exhaust Cutouts
Want remote-activated exhaust cutouts but don’t want to deal with electric motors that can’t handle the heat? Our vacuum-operated exhaust cutouts use a turbocharger wastegate actuator to open and close the blade—all you need to run is a line from your power brake booster. Those actuators can handle temperatures as high as 2,000° F, so they’ll be just fine under your car.

The cutout bodies are made from stainless steel and have a protective ceramic coating rated to 1,300° F. Available in 2.5, 3, 3.5, and 4 inch diameters, they fit common three inch diameter, three-bolt cutout flanges. Kits with dual cutouts come with a cockpit-mount rocker switch, vacuum line, and mounting hardware.

Summit Racing™ Tailshaft Seal and Bushing Kits
Nobody likes a leaky transmission tailshaft. Fix yours with one of our seal and bushing kits. They include a new rear seal and bushing to repair GM automatic transmission tailshaft leaks. The kit for Powerglide, TH-350, and TH-700R4/4L60 includes an O-ring, and can also be used on Muncie, Saginaw, and T-10 four-speed manuals.