Okay, I'm partial to high performance pats with the Feuling name on them like these hydraulic roller lifters for Twin Cam engines, but after speaking with Jim Feuling before his untimely death in 2002, you'd be, too. The founding genius/inventor of Feuling Performance was adamant about the good design of the Twin Cam but was steadfast about potential oil problems, especially in high-performance applications. Used in conjunction with Feuling oil pumps, these USA-made 8620 hardened-steel hydraulic roller lifters maintain critical oil flow to the valvetrain and meet the needs of large-lift cams and higher spring pressures. Don't risk your hi-po or stock motor. Contact Feuling Oil Pump Corporation at www.feulingparts.com or call 619-917-6222.