Fits 1991-up Ford 4.6L/5.4L and 2003-up Chrysler 5.7L/6.1L/6.4L Gen III Hemi

Headlock™ Bolts eliminate the need for lock washers, Period. That's because each Headlock™ Bolt features 24 equally-spaced, stainless steel teeth serrations that bite into and hold onto the attaching surface-eliminating the need for lock-washers.