so I did my stack on monday.
5" straight pipe from the downpipe back to a single 5" mitre cut stackk thats level with the cab.
LOUD. Thats all I can say. Open the passenger side rear window and its really fun to listen to.
Had tons of people tell me it dounds like a pulling tractor or cummins especially when I put in a tune with no pilot injection and a lot of fuel/timing.
The drone isnt too bad, however it doesnt matter which rpm Im at I can never hear the motor over the exhaust.
Right now I love it, might get old down the road, but It sounds really nice so I doubt it.