Well Gnarls the truck already has a hedman full length header and 2.25" exhaust exiting through a glass pack of some kind. I absolutely hate it, it's so loud. I was thinking of at least going to a dyno max super turbo or magna flow muffler. Possibly even putting a stock exhaust manifold back on the truck as well.
Hey G…
With an opened exhaust on a 22RE you have to be careful. I have experienced it myself and one of my friends experienced as well. The 22RE seems to be a little sensitive to too big of exhaust system. Too big and the bottom end torque really suffers. I know “back pressure” when discussing exhaust is a debatable word, but it seems that if the velocity is decreased too much it somehow decreases low RPM torque. That's just my speculation... I'm a long ways from an engine exhaust expert.
Currently on my 86 22RE, I have a DT header, 2.25” to stock cat that has been completely punch out, then 1.75” to a 2” stock muffler. It sounds throaty, but not loud or rappy.
On my 85 22R Standard Cab, I ran a DT header with 2” tubing, no cat, then to Thrush Turbo muffler. It sounded throaty, but not loud or rappy. New glass packs are notorious for that loud rappy sound after about 5,000 miles. I prefer a mild throaty exhaust.
If I were to try a different cam in my 22RE, I’d talk to Jim at 22RE Performance. 22RE’s Mamma ECU with her little brat sensors is picky about the cam profile.
Gnarls.
