BR billet rear diff supports, improved.
A few years ago we built our billet aluminum side differential supports. This part was designed to hold the rear diff in place and completely eliminate any movement all while saving 5 pounds over the stock supports. It has worked flawlessly but.............
The vibrations in some EVO's is just not tolerable after installing the side diff supports, mustache bar and solid engine mounts, my RS is one of those cars. If you are building a full race car it makes no difference, mount everthing as solid as possible and go race. While my car was tolerable to me in the past that has changed and I could no longer stand the noise and vibration.
My first step to try to get rid of some of the noise and vibration was to machine our side diff supports to accept a set of urethane bushings. I did this two weeks ago and installed them in the car. The difference is absolutely night and day, I'd say 90% of the noise/vibration I was not happy with is done. I am still running a front and rear "solid" engine mount and our mustache bar in the back, the car has NO soundening in it at all, so to say it's a major improvement means quite a bit.
If you currently have our side diff supports and want to send them in to have them machined to have bushings pressed in we can do it, the price for the machine work is the killer but we can do it, the cost is $245 for the machinging and the bushings etc. This will include stock mustache bar urethane bushings too, useless if you are running our mustache bar or AMS delete kit.
In the future we will be having our side diff supports CNC'd to begin with to accept the urethane bushings and the price of the kits will be reasonable. Right now it's a PITA to machine existing mounts to accept the bushings but I do want to put the option out there.
Here are some pictures of the mounts with the bushings in them:
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