We now have been using our Performance 7.3 POWERSTROKE LIFTERS for over 10 years! READY to ship MADE IN USA!
These roller tappets are made of premium material along with tighter tolerances than the OE lifter. Along with that u can expect slower leak down which turns into more lift at the valve.
The tighter tolerances also make it harder for the spring to deflect inside the tappet causing it to hammer the retainer and pop it out of the ring groove... and well you know what happens from here...U can also gain from the "high rev racing retainer " that adds to the security of holding the internals of the hydraulic tappet inside. Also has added oiling groove to send oil directly into roller.
These are a great upgrade on ANY cam job!