I was wondering if there is a shortened catted x or h pipe that is a direct bolt in for a 1990 gt with an auto trans because everone i find is for manual transmissions. Also then i would be able to get long tubes any suggestions.

 

I bought my o/r h pipe through summit. I have a 90 GT autoalso. And if i were you i would go with shorty headers, depending on what tools you have its more of a pain putting long tubes in, shortys will just swamp in and out in about 30 minutes.