Description
The DRT Racing Primary is one with 12-13-17-19 which is a shorter in the 4th gear, standard shaft is 12-13-17-21, so using this gear you can use higher gearing on your clutch and a T4 4th but not have the big drop in the revs between 3rd and 4th, this also is good for use with either a 11 inch wheel conversion or if you use a high RPM exhaust.
Also with a DRT gear, its is strengthened so excellent for that tuned engine.
