TA offers replacement main bolts that are far superior in strength over OEM main bolts. High Performance Series main bolts are forged from 8740 chrome moly and include such desirable features as generous under-head radius and rolled threads for the utmost in reliability. These bolts provide a nominal rating of 170,000 psi, and are 1000% less prone to fatigue as compared to stock bolts because of the unique process of rolling the threads after the heat treating process.

Pro Series main bolts incorperate all the key features of the High Performance Series but are rated at a higher 190,000 psi.