U would be surprised good companies out there sometimes hire good quality, knowledgeable employees, i drove around and asked tire shops, parts stores, and other car shops ...when i was working on my project ..usually people are nice and willing to help so when i have a question i ask...alot of people for advices u can even drive down and talk to the dealer mechanic, call shops where they do this kinda work ..don't buy anything else untill u have some clue on whats happening...