DONUT SHIELDS
Sold in sets of 2

These protective shields are made from a solid billet of 6061 T6 aluminum. These units weigh around three ounces apiece instead of nearly a pound each for the fabricated metal cages I have seen come through my shop on customer gearboxes. I checked the balance on one of the heavy steel units and it nearly hopped of the machine.

Once you have observed or experienced a donut blowout, you will fully appreciate the necessity of this product. I have seen gearboxes completely destroyed, bell housings cracked and even stud/mounting flanges ripped off the back of the block. When the drive shaft gets loose it can rip the sheet metal tunnel apart. I watched a Giulietta pole vault down the front straight at VIR. It started with some little pieces chunking out from under the car. He never got out of the throttle, the rear of the car rose about four feet in the air and pieces went flying everywhere. It was about ten car lengths ahead and I sat strapped upright in my seat as the entire driveshaft assembly assembly came out cart wheeling . It took a Spruell bounce just in time and only nicked the roll bar. My crew saw the workers drag it off the track and said the pinion was snatched out of the differential still attached.

Donut shields do nothing to protect your rubber "donut", but in case of an explosion it contains the fragments and holds the shaft together long enough for you to get out of the throttle and pull off the track.

Replaces the flimsy rubber bushing that supports the tail of the engine/trans mounting triangle. Remove a major source of parasitic horsepower loss due to misalignment of engine and driveshaft. The stock (a rubber thong) bushing does little to support, much less secure the tail of the gearbox as it slams around shifting gears and winding up under acceleration loads. Works for race or street machines to firmly fix the location and retain minimal flexibility. Why spend money to create power up front and have it unnecessarily diminished before it reaches the rear wheels?