Join Date: Mar 2004
Location: Paola, Kansas
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Open or muffled exhaust on a nearly stock Sammy
My '87 Sammy is nearly stock with the ECM'd Carb. It's time for a new exhaust system. I'll be using the original exhaust manifold. The local Sammy offroaders reccomend removing the cat, running a 2" pipe to a Turbo muffler, then necking down to a 1 7/8" tail pipe. They say the smaller tail pipe improves low end torque. They say the ECM will compensate for no cat/reduced back pressure. What's everybody think about this? I don't have to pass inspections or emissions testing were I live.
Also, I'm toying with the idea of running a straight 2" pipe from the original headpipe clear to the back. Would this be way too loud? (I wouldn't want Law Enforcement looking underneath, as this is a daily driver vehicle). Maybe I could put one of those tuneable buzz bomb mufflers at the end of the tail pipe. I'm talkin' about the expansion chamber/stacked baffle type muffler some of the import hot rodders use, they tune them by adding or removing baffle plates. My departure angle would not suffer, because I goin' to keep to stock liscense plate guard/rear hitch bar on, and the muffler would tuck in next to it. So, what do you all think? Straight pipe? Buzz Bomb muffler at the end? Would it sound like a WWII Zero fighter plane?...just kiddin' about the Zero sound.. but I'm seriously considering the rest.