Has anyone done this on focus engine mounts or rear mount? When I had a 02 Spec V there where no aftermarket engine mounts. So alot of guys filled the engine mounts with urethane. This is the stuff used to install windshields on cars. I tryed it on my Spec and it worked great. It got rid of the wheel hop. I know aftermarket engine mounts cause alot of vibration. With the urethane fill mounts I had a very slight vibration not bad at all. It was cheap $10 for a tube which filled 2 engine mounts and had plenty left over.