Atomic

iTrader: (42)

I'm tired of my exhaust not being what I want. I want it to flow well, and be dead silent on the inside. I dont really care if its loud or not outside, im just tired of it droning so much.

Right now I have pacesetter longtubes, 2 3" magnaflow 59559 high-flow cats to a dual 3" in, 3.5" out Y pipe, 3.5" dmh cutout, and 3" pipe to a magnaflow 13740, and single 3" tailpipe with 5" tip.

I am hoping to add a supercharger in the next year so I dont mind this exhaust being too big for me currently, the lowend with a stall and 4.56 gears isnt a problem anyway.

I was thinking about running the 3" pipe from the headers and keep the 3" cats while getting rid of the y pipe and cutout (takes up too much room), and running one of 3 options after that:

1. dual 18x4" glasspacks to a 5x11x22 DI/SO 3/3.5
2. a DI/DO 3" 5x11x22 magnaflow directly before a DI/SO 3/3.5" 5x11x22
3. a DI/SO 3/3.5 5x11x22 magnaflow directly before a SI/SO 3.5" 5x11x22

In all 3 cases I end up with 2 mufflers inline and a 3.5" single tailpipe. The 3.5" is a seperate issue I can worry about later.

I am not sure which combination would be quieter, and have the least interior noise. I would throw a stock muffler back on if it didnt suck for flow.

The part numbers for the mufflers:
DI/DO 3" 12599
DI/SO 3/3.5 12595
SI/SO 3.5" 12909
and some summit 4" glasspacks (hard to beat at $20)

any suggestions?

2005 Silverado

iTrader: (19)

I know 3 people that had/ have magnaflows, every truck drones, was way to loud in cab, and really the only good note was at idle.

VMaxAZ

iTrader: (1)

I really liked the Corsa Touring. Although, once I went LT's and S/c'd, the raspy sound at WOT is nerve racking...I ended up adding a bullet in front of the muffler to almost eliminate the rasp.

GMCtrk

iTrader: (27)

I'd run a stock 3.5" Denali/escalade muffler. You won't lose any performance

gs7793

iTrader: (8)

my flowmaster drones so bad....i would never get the pipes dumped before the axle again...

Atomic

iTrader: (42)

The only part of mine I dont like is the 1500-2500 range where its very annoying. Coincidently thats where I spend 90% of the time driving.

I had a 5x11x22 magnaflow before and it didnt drone near as bad in the cab so my thinking is if one is good, then 2 must be great.

Is the escalade muffler DI/SO?

ap2002

iTrader: (8)

my 22" magnaflow did not drone inside at all...

006rcsb

my 24" magnaflow is dumped before the axle and i have no drone...none

Atomic

iTrader: (42)

The magnaflow I have now (13740) is the 36" case, 7" round XL series. I think its actually a bigass resonator and not a real muffler.

But it any case, any thoughts on which way to put mufflers in line?

GMCtrk

iTrader: (27)

I think the escalade muffler is SI/SO