COMP Cams 12-821-14 47S 312R-8 Mechanical Roller Camshaft

The COMP Cams 12-821-14 camshaft is designed for drag race applications using a Small Block Chevy engine. This mechanical roller camshaft features a 4/7 firing-order swap and a .900-inch base circle, providing a purpose-built valvetrain component for high-performance racing applications.

With .679-inch lift on one side and .645-inch lift on the other, the camshaft offers 312/325 degrees of duration and a 108-degree lobe separation angle. Its operating range is listed at 5,000 to 7,500 RPM, making it suited to applications intended to operate in a high-RPM drag racing range.

The 47S 312R-8 profile combines COMP Cams engineering with specifications tailored to Small Block Chevy drag race builds. This camshaft is sold individually and provides the core camshaft specifications needed when selecting a compatible mechanical roller valvetrain setup.

Features:

• Brand: COMP Cams
• Part Number: 12-821-14
• Application: Drag race
• Engine Type: Small Block Chevy
• Camshaft Type: Mechanical roller
• Firing Order: 4/7 swap
• Base Circle: .900 inch
• Lift: .679/.645 inch
• Duration: 312/325 degrees
• Lobe Separation Angle: 108 degrees
• Operating Range: 5,000-7,500 RPM
• Quantity: Each