low2001gmc

iTrader: (137)

i got a 6.0 with cam, bolt-ons, pace lts, no cats, dual 3 inch pipes, x-pipe, dual 3 in/out spintech and that was it...it was loud. i then had tailpipes over the axle and it quieted down. 2 weeks later, i still wish it was quieter so i could install my stereo system back in...

tk-mpl

iTrader: (1)

I've got dual Flo-Pro on my 08 and it is quiet..

ramsey rider

iTrader: (3)

Add some dynomax bullets after the mufflers ,thatll quiet it down .worked for me.

Stoichiometric

iTrader: (10)

Walker makes some huge mufflers that are straight through and very quiet.

low2001gmc

iTrader: (137)

what series or model, part number #?

low2001gmc

iTrader: (137)

i have thought about these as well. this next month i will be recuperating financially after my engine, tranny swap, etc and will be considering all suggestions......thanx, rob (956) 802-7700.

low2001gmc

iTrader: (137)

looks like i will be getting some bullets to install after the mufflers......but

any other suggestions before i make any expense??? thanx, rob.

AdioSS

iTrader: (2)

which way to the tailpipes point? straight back? down? 1 out to each side?

Straight back should be less loud to the driver than the others. Maybe a little more sound deadening material to the interior would help. Sure it will add a few pounds, but nothing compared to the weight of the rest of the vehicle.

SnakeOiler

iTrader: (6)

I think the "best quietest muffler" would be the one from the factory.

AdioSS

iTrader: (2)

I've also heard of some cone-shaped screens that you can have welded into your exhaust that are supposed to quiet the exhaust down without changing the tone.