Hello, newbie here. stock '06 STI with catless Prodrive Mid-pipe. ( Excellent mod thats noticeable for cheap ). my question is with stock down pipe and catless mid pipe....can I add a cat back exhaust without getting boost creep? ( keep in mind I am keeping the stock Down Pipe ). Thank you for your imput. P.S. went from Infiniti G35 to STI. :naughty:
you won't if you keep the stock dp. Welcome to the boards as well. You should try to make it out to the install day.