Northside405

Has anybody else's GMMG catback gotten louder over time? I feel like mine has.

SSickLS1SS

every exhaust gets louder over time, its breaking in.

BOBS99SS

iTrader: (2)

Yeah they all do,since we have solved that problem ,what do you guys think tsp x pipe and sweet thunders ,or gmmg I cannot make up my mind,even thought of a magnaflow and cutout

LSXnorcal

Mine hasn't. Mufflers with packing will get louder over time as the packing gets pressed in. The GMMG only has chambers, so there isn't anything to get "broken in."

BOBS99SS

iTrader: (2)

Every exhaust I have ever had has gotten louder over time,flowmaster,magnaflow,slp,borla,maybe the gmmg doesn't but I have heard more than just the op say there's have gotten louder,I would think the chambered wouldn't but that's the myth,lol,I wish I had one to comment on this,but I cannot make up my mind lol

cookba

iTrader: (10)

mine got louder when i added a cam and heads......................wonder why? LOL

MTN_Z

iTrader: (7)

I have your exhaust setup (except ARH) with stock heads and cam. It's already very loud so I can't imagine how your setup sounds now.

masterz28

iTrader: (8)

I wish I thought of making this thread when I cam'd my car. hahaha

99LSS1

iTrader: (12)

Mine had a real nice tone with the stock set up, Got a bit louder with the addition of LT's and catted-y, With the heads and cam it was tolerable!!! Now with the 402, I am considering changing my set up. Almost obnoxious now!!!

MattxFatal

iTrader: (4)

Got any video of it?

RevGTO

iTrader: (12)

That's it, mods are what do it. I liked mine perfectly when stock. I added a 3000 stall converter, and it became a little over the top, especially when cold. LT's really ramped it up.

BOBS99SS

iTrader: (2)

If any of you guys are thinking of selling yours get back to me I have been looking for one for awhile now,I would like to stay with a catback instead of duals,but if I couldn't find one I was just gonna order one from tsp

hitmanws6

iTrader: (20)

Mine stayed the same when i ran it on my old setup with shorties. Now its a little much, Im getting rid of it next week

99LSS1

iTrader: (12)

Here is an idle clip after the 402 install!!!
http://www.youtube.com/watch?v=IVYJ7-AKOxM

SSmokin99

iTrader: (7)

That thing is crazy loud, but it sounds F*CK*N GOOD!

z28camaross2

iTrader: (1)

mmmm i need to change my pants after hearing that

FBodyPerformer

iTrader: (19)

This should help, an entire thread about making a GMMG sound good after mods
https://ls1tech.com/forums/generatio...ls-y-gmmg.html

Titanws6

iTrader: (35)

How much are you gonna ask for it?

z28camaross2

iTrader: (1)

+1 on price ur sellin it for lol

jthunderz28

Does anyone have a clip of their GMMG with just a cam and without headersjust through the stock manifolds. I live in CA, so that's why I'm avoiding headers. This is also my daily driver.

Anyone??