Installed my clifford header finally! Seat of pants determination; seems to help. My comanche 4x2 is a street driver only, and the hills on the interstate seem less of a pull for the 4 banger.
Did have an installation problem though. The header is built with the front two tubes collecting into one tube, the back two collecting into one tube, and those two then going into the collector. The "Y" where the front two came together was touching my block at the pan. I tapped in the edge of the pan, but that did not help. I called Clifford and they said they never had that problem before. They suggested having a local exhaust shop bend the 4 tubes some to get it to clear. Neither shop in my town would do that since it would make them liable for any problems. After a few frustrating calls to Clifford I flattened the back side of the "Y" touching the block. Did not use heatt. Now the collector was hitting my bell housing!
So Clifford had me send them back, shipping at their expense, to modify them plus check them with their jig. They claim it fit their jig perfectly but loosened up the two Y's and turned them out a bit. Received them back and the front "Y" still touched. I called clifford again and said I was tired of fighting this and wanted my money back. They said they could not do that since they , at my request, modified them. I told them since they claim this header fits all 2.5's from, I think they said, 86 to 91, and mine is an 87, the reason for my problem is obviously a fault with they way this header was made. They still refused. Needless to say, I told them this left me with no choice but to never buy clifford products again, and let others know how I was treated.
After hanging up I went to the shop where the head pipe would be fitted to my header, and he said "I will hold the torch while you hit the header and flatten out the 'Y' area." I did, they now barely clear, and it's on the street. Don't think it gave me the 15 or more % increase in hp they claimed although it did help some.