Keep horsepower and torque in line with PST's new NHRA legal drive shaft loop. PST's new drive shaft loop will protect you as well as your vehicle with the .250" steel that is used in its construction. This is a must have for any high horsepower A or G body owner with a car that runs a 13.99 or better in the quarter mile. These will mount in factory bolt holes without drilling on 1978-88 models, but requires drilling (4) holes on 1964-72 models. All instructions and hardware are included.