Cast iron offers maximum durability and wear resistance for long distance touring. The standard since the invention of the piston engine. Note: Standard non-oversize dimensions (for reference only) are 0.5650" O.D. (14.35mm); 0.3085" I.D. (7.84mm); 1.77" OAL (44.96mm).

C630 bearing bronze is a tough nickel-aluminum-bronze alloy typically used in high performance and racing applications where rapid heat transfer from the valve to head is important. Note: Standard non-oversize dimensions (for reference only) are 0.6250" O.D. (15.88mm); 0.3745" ID (9.51mm); 1.91" OAL (48.51mm).

C630 bearing bronze is a tough nickel-aluminum-bronze alloy typically used in high performance and racing applications where rapid heat transfer from the valve to head is important. Note: Standard non-oversize dimensions (for reference only) are 0.6250" O.D. (15.88mm); 0.3745" ID (9.51mm); 1.91" OAL (48.51mm).

Cast Iron offers maximum durability and wear resistance for long distance touring. The standard since the invention of the piston engine. Note: Standard non-oversize dimensions (for reference only) are 0.6250" O.D. (15.88mm); 0.3745" ID (9.51mm); 1.91" OAL (48.51mm).

Cast Iron offers maximum durability and wear resistance for long distance touring. The standard since the invention of the piston engine. Note: Standard non-oversize dimensions (for reference only) are 0.6250" O.D. (15.88mm); 0.3745" ID (9.51mm); 1.91" OAL (48.51mm).

C630 bearing bronze. Comes with special shoulder for ease of installation. Takes OEM valve seals. Shortened to accept valve lifts up to .600". C630 bearing bronze is a tough nickel-aluminum-bronze alloy typically used in High Performance and racing applications where rapid heat transfer from the valve to head is important. Note: Standard non-oversize dimensions (for reference only) are 0.5620" O.D. (14.27mm); .3085" I.D. (7.84mm); 2.100" OAL (53.34mm).

C630 bearing bronze. Comes with special shoulder for ease of installation. Takes OEM valve seals. Shortened to accept valve lifts up to .600". C630 bearing bronze is a tough nickel-aluminum-bronze alloy typically used in High Performance and racing applications where rapid heat transfer from the valve to head is important. Note: Standard non-oversize dimensions (for reference only) are 0.5620" O.D. (14.27mm); .3085" I.D. (7.84mm); 2.100" OAL (53.34mm).

Cast iron. Comes with special shoulder for ease of installation. Takes OEM valve seals. Shortened to accept valve lifts up to .600". Cast iron offers maximum durability and wear resistance. Perfect for long distance touring applications. It is the standard since the invention of the piston engine. Note: Standard non-oversize dimensions (for reference only) are 0.5620" O.D. (14.27mm); .3085" I.D. (7.84mm); 2.100" OAL (53.34mm).

C630 bearing bronze is a tough nickel-aluminum-bronze alloy typically used in high performance and racing applications where rapid heat transfer from the valve to head is important. Note: Standard non-oversize dimensions (for reference only) are 0.440" O.D. (11.18mm); 0.2340" I.D. (5.94mm); 1.925" OAL (48.90mm).

C630 bearing bronze is a tough nickel-aluminum-bronze alloy typically used in High Performance and racing applications where rapid heat transfer from the valve to head is important. Note: Standard non-oversize dimensions (for reference only) are 0.5620" O.D. (14.27mm); 0.2750" I.D. (6.99mm); 2.02" OAL (51.31mm).

Cast iron offers maximum durability and wear resistance which is perfect for long distance touring applications. It is the standard since the invention of the piston engine. Note: Standard non-oversize dimensions (for reference only) are 0.5620" O.D. (14.27mm); 0.2750" I.D. (6.99mm); 2.02" OAL (51.31mm).