After calling around for pulley sets, I decided to use LET. Erick is a great guy who answers the phone everytime you call and answers all your questions. The best part is if he doesn't know something he states "good question I don't know, but I'll find out". His pulleys are a little more money but they are a fluid balanced design vs a hard rubber dampener design of the factory one, which should eliminate the potential problem of the rubber dampener falling out and causing a misfire code. After considering my three choices of 178/181/185, I chose the 181.