Since the metal-rubber washer piece under the MX-5 differential bushings is exposed to all the dirt and grime from the road, it absolutely loves to rust and that’s no good if you like to keep your diff attached to the car. Also the stock bush/stopper cannot be used with polyurethane bushings, as the rubber part of it does not allow for proper installation. So we created a long lasting, high quality solution.
The differential is attached to the rear subframe via two bushings (left and right) and at the bottom of them are these stop washers. Our custom stainless steel diff mount stop washer is lightweight, rustproof and for-a-lifetime upgrade from the rubber-and-steel OEM one. It is designed to be used with polyurethane diff bushings, so we recommend getting them together as a great combo to improve your shifter precision and feel.
Listing is for a pair of two (good for one car).
Fits all 1989-2005 cars: NA (Mk1), NB (Mk2) and NBFL (Mk2.5). Does not fit with stock rubber differential mount bushings.
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