Richmond is the leading manufacturer of professional quality, hi-performance ring and pinion sets. For over 80 years, the Double Diamond has signified the highest quality gears in the racing industry! We are proud to offer an unmatched selection of premium ring-and-pinion sets and transmission components engineered manufactured to improve your vehicle's performance. Richmond premium products are engineered to meet or exceed OEM specifications at a great value. Richmond ring and pinion gear sets are computer-controlled manufactured from the foundry, to cutting gears at 1,000th of an inch precision, to heat-treating the finished product. This consistently provides some of the strongest gears possible. The superior quality of Richmond Performance Products is a result of continual research and development, outstanding design and state-of-the-art manufacturing. Extensive testing is performed on all Richmond products. Engineered to perform faster and more reliable, our products are winners both at the Daytona 500 and U.S. Nationals for decades!