Depends where your at, there is a spot in Gardena where toysport used to be. There is a spot in Downey on Stewart and grey, there is one in Escondido. Their all over the place, at least 2 or 3. Just ask and they'll tell you where the good ones are. The one in Gardena gave me a runny valve cover once but they didn't charge me after I complained. They offered to do it again but it was on a friends show car right before a show. I now only use the shop in Downey since then.
