yo check this, i did my 30v swap into my 96 A4, so now i just need help on finding a test pipe for my 96 audi a4 cuz thing is i still have my stock piping from the 12v >> so yea i need help on finding a test pipe for the 12v piping, any input is greatly appreciated! i was gonna do the two test pipe for the two cats and keep my magnaflow 14815, any other ideas on what i should do for my exhaust set up let me know...