I just finished my new exhaust a few days ago. It was straight piped with the factory exhaust, and after the y it went to some 2.75" pipe I had around. LOUD!
I did 2.5" and mandrel bends from the manifold collectors going into a dual 2.5" in, single 3" out and a 3.5" tip.
This is a new muffler from Cherry Bomb - the Salute. It is very impressive because it's fully stainless steel and well designed, but cost $36. I got a 3" in, 3" out for another truck and it is very nice too.
It has a quiet and low rumble but opens up when you're really on it, so it's just basically a big glasspack. I'm very happy with it so far.
My EGT also dropped by 50 degrees or more. I was at 550-600 at 70 mph, and the last two days I have been 500-550 with the new exhaust. I also dropped from 1,000-1,050 degrees on a big hill to just 850-900. After a few weeks to break the muffler in I'll put a before and after video up on youtube. The only thing I regret with a muffler is losing my jake brake!
Some pictures:
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Y pipe before, vs dual 2.5 after. I would habe put an x or h right in there but didn't have the motivation.
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A view inside the muffler with a day of soot buildup
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Another tidbit, summit racing has polished stainless 3" in, 3.5" out tips for only $15 right now.
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