By slowing the leak down rate, COMP Cams Performance Lash Adjusters provide more lift and duration while improving valvetrain stability. Just like lifters in a pushrod engine, lash adjusters in Ford Modular engines can leak down under high RPM, causing lost duration and lift, as well as more valvetrain wear. The COMP Cams Ford Mod Engine Performance Lash Adjusters are engineered to have a slower leak'down rate when compared to stock lash adjusters. This provides more lift and duration when aggressive performance camshafts and heavy-duty valve springs are installed. Additionally, because they better resist collapsing than stock lash adjusters, these Performance Lash Adjusters provide better valvetrain stability and high RPM durability. The black oxide finish prevents rust and corrosion while contributing to increased durability and life span. For more information, visit www.compcams.com or call 800-999-0853. (Content courtesy of COMP Cams)