These Crower EnduraMax roller lifters are the latest in Crower's line of highly durable roller lifters. This premium roller series includes a needleless bearing option or "NBO" and high pressure pin oiling "HIPPO." NBO is a high-tech needleless bearing built to withstand today's severe valve spring pressures and extreme rpm. The HIPPO feature feeds oil directly to the roller bearing assembly. Crower EnduraMax roller lifters are available in numerous different O.D.s.
We have used these lifters in our DRAG WEEK engines with no issues whatsoever! If you are looking for extremely high quality roller lifters, look no further than these Crower EnduraMax roller lifters.