seriously, do the other side aswell save time in the long run, i figure but not sure that the extra compression from fixing one side will find fault in the other side if it is weak, because mine went after about 4k of replacing the other one. Get a kit off ebay which includes all the stuff you need should be less that £60 with bolts and all gaskets. I had to pay to get mine done as i don't have garage and it was -6c here when it went.
Onetime
Onetime