I think you're right about the exhaust.
I am going to switch back to a stock type, with the stock 2-1/4" sized pipes. Maybe just add a turbo muffler for better flow. Also, I found out it only has 3.08 gears in it. I also put a set of the correct sized tires on it, which are 235/75R15's, which has gotten me a little more power back. The 31x10.50's were/are like brand new, off of my old truck. Mine is a 2wd.
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You must be FAST...
cuz you wuz FLYIN'...
when I PASSED YOU!
My "BARNEY" car