Sifton WR/KR Cam Lobe Set for 45-Inch Flathead Engines with Roller Tappets
Upgrade your 45-inch side-valve Harley-Davidson engine with the Sifton WR/KR Cam Lobe Set. This four-lobe kit uses KR profiles that fit 45-inch motors and also works in WR engines when used with roller-type tappet assemblies. Cam cores are not included. Designed for use with original WL-type cams, this set requires removing the old lobes, degreeing them into the correct position, and welding for optimal timing and performance.
Intake lobe lift is.415 inch with 300 degrees duration, and exhaust lobe lift is.400 inch with 275 degrees duration. These high-lift, full-race cam lobes deliver a significant increase in airflow and horsepower over stock components. The kit is sold as four lobes and is intended exclusively for roller-type tappets (not compatible with flat tappets). Manufactured in Taiwan for quality and durability.
- Designed for 45 inch flathead engines only, suitable for vintage Harley-Davidson G models (1936–1972) and W models (1937–1952).
- Cam lobes are installed by removing the old lobes, degreeing into position, and welding.
- Sold as a set of four lobes for a comprehensive upgrade.
- Exclusively compatible with roller-type tappets; not suitable for flat tappet systems.
- For optimal performance, pair with the 45 Tappet Base and Tappet Kit (SKU 49-0850) as an accessory.
- Manufactured in Taiwan for quality and durability.
Sifton WR/KR camshaft lobe set includes four lobes. Features KR lobe profile that fits inchW + G inch 45 inch motor. Also works in WR but requires roller type tappet assembly. Camshaft cores are not included. For 45 side valve models.
Upgrade your 45 inch Flathead Harley Davidson engine with the Sifton WR/KR Cam Lobe Set, designed specifically for use with original cams WL type. This set requires removal of the old cam lobes, which are then degreeed into the correct position before welding into place, ensuring optimal timing and performance. Crafted in Taiwan, these high-lift, full-race cam lobes are engineered for serious performance enthusiasts looking to maximize their engine's potential. The intake lobes feature.415 inch lift with 300 degrees duration, while the exhaust lobes provide.400 inch lift with 275 degrees duration, delivering a significant increase in airflow and horsepower over stock components. Please note that these cam lobes are sold as a set of four and are intended exclusively for use with roller-type tappets; they are not compatible with flat tappet designs. Proper installation and compatibility are crucial for achieving the performance gains these components promise, making them ideal for custom builds and racing applications. Whether you're restoring a vintage Harley or pushing your engine's limits, the Sifton WR/KR Cam Lobe Set offers premium quality and durability for your flathead engine. For optimal performance, consider pairing this set with the compatible 45 Tappet Base and Tappet Kit, SKU 49-0850, included as an accessory item.
Features:
- Designed for 45 inch Flathead engines only, suitable for vintage Harley Davidson W models from 1937 to 1946
- High-lift, full-race cam lobes for maximum performance
- Intake lobes:.415 inch lift, 300 degrees duration
- Exhaust lobes:.400 inch lift, 275 degrees duration
- Must remove old cam lobe and degree in to correct position before welding
- Compatible exclusively with roller-type tappets; not suitable for flat tappet systems
- Sold as a set of four for comprehensive cam upgrade
- Manufactured in Taiwan for quality and durability
Fitment:
Harley Davidson G 1936
Harley Davidson G 1937
Harley Davidson G 1938
Harley Davidson G 1939
Harley Davidson G 1940
Harley Davidson G 1941
Harley Davidson G 1942
Harley Davidson G 1943
Harley Davidson G 1944
Harley Davidson G 1945
Harley Davidson G 1946
Harley Davidson G 1947
Harley Davidson G 1948
Harley Davidson G 1949
Harley Davidson G 1950
Harley Davidson G 1951
Harley Davidson G 1952
Harley Davidson G 1953
Harley Davidson G 1954
Harley Davidson G 1955
Harley Davidson G 1956
Harley Davidson G 1957
Harley Davidson G 1958
Harley Davidson G 1959
Harley Davidson G 1960
Harley Davidson G 1961
Harley Davidson G 1962
Harley Davidson G 1963
Harley Davidson G 1964
Harley Davidson G 1965
Harley Davidson G 1966
Harley Davidson G 1967
Harley Davidson G 1968
Harley Davidson G 1969
Harley Davidson G 1970
Harley Davidson G 1971
Harley Davidson G 1972
Harley Davidson G 1973
Harley Davidson W 1937
Harley Davidson W 1938
Harley Davidson W 1939
Harley Davidson W 1940
Harley Davidson W 1941
Harley Davidson W 1942
Harley Davidson W 1943
Harley Davidson W 1944
Harley Davidson W 1945
Harley Davidson W 1946
Harley Davidson W 1947
Harley Davidson W 1948
Harley Davidson W 1949
Harley Davidson W 1950
Harley Davidson W 1951
Harley Davidson W 1952
