Same thing happened to me! Dealer parts dept not always taking time to instruct and result, missing paarts@!! I used the old washers (since I had the car up on lift stands, etc) and was fortunate that they did not leak. Alsways check parts ordred that they have completee add on parts! Ex: Crossover exhaust pipe, no special clamp included, have to ask for it! (guess what, not in stock, need to order seperately!) Once you have gone through this route, you watch out! Regards, Abe G