scidav87

iTrader: (16)

Just courious if anyone actaully knows if stock ls1 mufflers are actaully restictive, and if so, how much?? I have aftermarket exhaust, but now its too loud for DD and wanting to perhaps put the stock muffler with my LT and ORY and just install a cutout.

Intercooler2

iTrader: (24)

That's what I have 3" to 4" merge with a cutout. It goes through the stock muffler and sounds real good. Going through it you may loose a few HP but thats what the cutout if for when you need it. IMO the better way to do it to save your sanity!

scidav87

iTrader: (16)

how loud is the stock muffler? I want it alot quiter, but i don't want SUPER quite either. Still pretty noticable? I'll put the stock one on, but i don't wanna kick myself for it being "unheard" as well. As long at it still has good rumble, lol. Thanks for the help bud!

redtail2426

iTrader: (10)

just put a stock ws6 catback on it.It will sound nice and wont be too loud,but will be loud enough to get noticed.I picked up 18 rwhp when i switched from my stock ws6 catback and went to the gmmg

scidav87

iTrader: (16)

sounds very restrictive!

Intercooler2

iTrader: (24)

From the cats through the junky factory Y and 2.75" pipe 18 RWHP sounds like a decent amount. The way I have mine 3" into Flowmaster merge coming out 4" I bet it isn't near that amount.

Mine is about as loud as I want it. It picked it up a decent amount and when cruising like down Main Street it has a nice rumble to it. Good thing is you can take any kind of passenger and not have them get put off by the noise. You crack on it the thing is pretty loud but

94lt1m6

iTrader: (9)

IM running LT's ORY and factory muffler...it is pretty damn quite at idle, It doesnt sound bad though. What kinda mufflers you got? I am going to put duals on mine just cause i got a ticket for running with the cutout. I could trade you + some cash.

BTW i can feel a huge diffrence in the throttle when i switch from cutout to muffler...You def loose a good deal amount of power.

TheSilverOne

iTrader: (22)

i would ditch the LM1

a magnaflow catback would be another option

Intercooler2

iTrader: (24)

I have to schedule a tune and will dyno open cutout in the 4" section vs through full exhaust and post numbers. Going to be a bit because wallet is drained on all the car mods recently.

scidav87

iTrader: (16)

I have LT ORY and LM1 catback, but in place of the resonator i have a 3" Magnaflow bullet muffler. Sounds BADASS at idle and WOT, but with my heads and cam...etc its really loud for DD with my wife, lol. I live in MO, so we could talk about a deal maybe..

PowerShift408

iTrader: (44)

On my 408, car made 497 through the SLP dual dual, which is a factory exhaust. Then, opening the cutouts at each header flange, I made 514.

scidav87

iTrader: (16)

amazing how restrictive factory exhaust is!

Blk_Ws6

iTrader: (4)

I had headers with a hooker areo camber muffler with a dynomax bullet on the i pipe and you wouldn't know I had headers.

Ping King

iTrader: (20)

do a nice y pipe with a cutout. Ive had every single exhaust setup i possibly could.

I finally went back to LT's, catted y, nice merge, vacuum operated cutout, and a 2otl with hidden tips

white99

iTrader: (13)

I have pacesetter LTs and a Y pipe with stock mufflers. Very quiet, dynoed 400rwhp through them. Then when I opened the cutout which is right after the Y I dynoed 440. I'd say they're pretty restrictive

Brian2006

iTrader: (42)

Hooker catback is what you need

Chhh Chhh

iTrader: (2)

flow'd good on stockrs they put

Mean87SS

iTrader: (21)

You'll gain about 10-12 HP...

scidav87

iTrader: (16)

Thanks for the help! I have decided to get the Magnaflow Catback w/cutout, for the money and i know it won't be too loud for driving the neighborhoods at night, lol.

Blk_Ws6

iTrader: (4)

Well hooker would've been cheaper quieter an sweeter than magna flow.