HP+™ Lifters by Feuling®. Performance upgrade, drop in replacement, set of 4. Optimized oil flow to top end - valves, springs, rockers, shafts & valve guides. Recommended for use with the Feuling® Oil Pump or comparable high volume oil pump.
Feuling® was known as a "skunk work" facility specializing in engine design and development working with and licensing technology to the major manufactures such as Ford™, General Motors™, Harley Davidson™, Chrysler™, Nissan™ and Edelbrock™.
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