X pipes vs H pipes, what to use for a dual exhaust conversion April 05, 2010, 10:47:41 PM Im going to be changing my 1988 Cougar's single exhaust to a dual, whenever I get atround to it, and i want to know if parts from a fox mustang (header, ler, pipes) will work on mine, cause no stores carry cougar parts. If i could id just go buy hedman headers and flowmaster lers fit for a mustang and use mustang dual pipes the rest of the way. If not i guess id have to bend my own, and find someplace thats ells cougar headers. Also i keep readin about these X and H pipes...whats the difference between them, and why does having both pipes joined improve horsepower? Quote Selected
X pipes vs H pipes, what to use for a dual exhaust conversion Reply #1 – April 05, 2010, 11:09:27 PM I just answered this above in the "General discussion" section.http://www.foxtbirdcougarforums.com/showthread.php?p=317184#post317184 Quote Selected