Just coming up on a 1000 miles on my 3" Super Turbos, offset inlet, center outlet on a 475" hemi 70 RR. tti's 2&1/8 primaries, with full 3" exhaust.

I like the idle, fairly quiet but not too quiet. There's a drone it goes through at a certain rpm per gear. A little loud at 55, and a bit too loud at 70-80mph at 3200rpm with 3.54 gears to where I ware ear plugs for a log trip.

I didn't put any aftermarket sound deadener in. I wanted to see how it was as is. I mostly go to local cruises so not a big deal yet with that. Putting around town is OK but have to speak up a little for a conversation. Mostly the interstate roar that bothers me. The Passon 5 speed may help a little with that, cause the more rpm's the loader it gets.