[08stangin]

what type of x pipe can i put on my mustang and still pass smog??

[coolwaterblvd]

basanni with the cats or u can get the offroad one and put the stock ones in it from a 99 - 03 gt they flow as well asany aftermarket ones the only thing is how many u want to put back in the 2 or the 4 it is up 2 u. The five speed cars had 6 the autos had 4. I have 2 on mine and the computer does not know the difference but the smog I have no idea because we have not regulations or checks here.