So a few months back i popped my differential cover or "IRS" cover with bad wheel hop, i made the mistake of purchasing $160.00 dollar "IRS" cover brace from ebay...all that brace did is not allow the cover bolts to tighten ALL THE WAY DOWN correctly causing leaks and made the install very difficult, might i add it also made a nasty howl inside the cockpit..my advice to anyone who goes through what i did is purchase the ford racing aftermarket diff cover its worth the money and pain youll save yourself, i do my own work and it made a world of difference. Heres a before and after..