So im getting ready to have my greddy turbo installed and as im making the appointment the guy says that i'll need a new clutch and flywheel. He told me that the stock will go out within a month, is this true? Im going to have the FMIC and BOV installed but only running at the stock psi for the kit. Is he just trying to sell me a product or do I really need those two parts. He also tried to sell me a 3 inch piping with N1 muffler and h/f cat for $1150.00. I know this seems a bit expensive so should i just buy a 3 inch exhaust with h/f cat. What are the pros and cons of a manufactured exhaust system and custom.