The instructions said to use a cup washer on top of the rear bumpstop. I've assembled both rears but noticed the washer sits loosely and will make noise when I shake the assembly. Is it neccessary to use it? I don't want to take it apart a second time if it's going to make noise once installed.

Anyone with these notice any noises in the rears? Thanks guys.

 

call brian at cattman performance....but he will probably put you in contact with progress...so just call them, they are really helpful...!