COMP Cams 947-16 Race Extreme 1.660" OD Triple Springs, 2.050" Installed Height, 16 Springs

With a spring rate of 681 pounds per inch and a triple-spring configuration, COMP Cams' Race Extreme valve springs, part number 947-16, deliver strength and stability for extreme engine demands. The triple spring design creates increased load capacity compared to dual-spring systems, engineered from Super Clean wire and subjected to extensive quality control. Each spring has a seat height of 2.05 inches, coil bind height of 1.145 inches, outer spring inside diameter of 1.196 inches, and outer spring outside diameter of 1.66 inches, accommodating.570 inch guide diameter spring seats.

• Series: Race Extreme
• Type: Triple Valve Spring Kit
• Number of Springs: 3
• Spring Rate: 681 PPI
• Seat Height: 2.05 inches
• Coil Bind Height: 1.145 inches
• Outer Spring Inside Diameter: 1.196 inches
• Outer Spring Outside Diameter: 1.66 inches
• Inner Spring Inside Diameter: 0.863/0.627 inches
• Guide Diameter:.570 inches
• Seat Pressure: 304 pounds per square inch
• Damper Included: No
• Material: Super Clean wire
• Compatible Retainer: 739-16
• Compatible Shims: 4756
• Compatible Spring Seats: 4786-16
• Compatible Spring Cup: 4708-16
• C.A.R.B. Exempt for On-Road Vehicles?: Yes
• C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: Yes, but must be a race/competition only vehicle.
• C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?: Yes, but must meet tailpipe emission standards for year of vehicle.
• C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.
• C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.
• C.A.R.B. Exemption Reason: No impact on pollution output of vehicle.
• Damper: No