C&R Racing offers for both race and street, the most comprehensive 9in drivetrain program, period. C&R has been supplying NASCAR for many years and now offers services for street/strip vehicles. With features such as REM service, ARP fasteners and our own 9in dyno to break in each component, so you don’t have to. This allows us to listen to each one and make sure it is not noisy before you receive it.