Ok so I just put on some test pipes on my 91 NA, the question i have is there were two hose on the stock exhaust, one on each side, what do they do and now where do they go cuz they sure dont hook up to the new pipes.

 

It's your AIV system. delete the entire system as well as the PRVR system while your under there. You will appreciate it.

 

thanks will do...but i just lost compression in cylinder number for so i have new troubles lol