9mm Special Bolt For Ring Gear, (I.R.S., Long), Bulk

Keeping up with today's highway traffic can be quite a job for your engine. Constant high RPM's reduce gas mileage and engine life. Switching to a 3.88 to 1 Ring and Pinion can eliminate these problems by reducing engine RPM at cruising speed. Fits full synchro Type 1 transmissions with keyed style fourth gear and rhino transmission case.