Shooter9

iTrader: (5)

I have looked in the sponser section and have had no luck was woundering where I could find theese. Thanks in advance for any help.

SSilverSSurfer

iTrader: (8)

i dont believe the mufflers are sold by themselves...i think it comes as a cat back

orangeapeel

iTrader: (18)

Same as the exhaust tips.

Wicked02SS

http://www.gmmginc.net/

Redneck Z

iTrader: (3)

You can only buy them from GMMG, GMMG or GMMG.

GR33N GoblinM6

iTrader: (14)

pff.. you guys... you forgot www.stainlessworks.net

same chambered muffler.. summitracing.com sell the same SW muflers but for $1 less..

OldeSkool

well... stainlessworks has a very similar system, made of 304 stainless and i believe it has a 3.5 inch I-pipe... also... doesn't the GMMG just use old school chambered pipes... a number of different outfits make varieties of those... like http://www.classicchambered.com/classic/products.html and sweet thunder and stainlessworks...

Redneck Z

iTrader: (3)

The SW catback is similar, but not the same. A different I pipe, and different chambered mufflers.

GR33N GoblinM6

iTrader: (14)

those are not the same... i believe GMMG and stainlessworks use perforated cores.. the one you posted use lovured cores that inhibit airflow. this is what it should look like. here is a picture

Cumbias

So GMMG mufflers out flow Sweet Thunders? How much power is normally gained from GMMG cat-back in a stock car?

Sorry for kinda using the thread,
didn't want to start another "shorty" thread

300bhp/ton

About the same as any other cat back, the biggest restriction in the stock exhaust is the headers, the CATS and the Y pipe. By changing the cat back section of the exhaust is removing what is not currently a restriction. However, if you upgrade all the above and leave the stock cat back in place it will then become the restriction.

In reality, if you see 2-5bhp from a cat back you have done quite well. What you should notice is the illusion of increased power due to the increased noise. Throttle response may also be slightly better.

Redneck Z

iTrader: (3)

I disagree. The stock catback IS a restriction even when everything else is stock. That's why you gain so much hp with just a catback swap. Magnaflow's dyno testing shows 18rwhp on a STOCK car, with only a catback swap. I also don't agree that the stock Y is a restriction. The cats yes, but there are many dyno's of just swapping in the SLP piping and nothing changes on the dyno. I've even seen negative dyno gains with just a y-pipe swap(not cats incl.).

Cumbias

I think 300 has the more correct statement. The cat-back swap adds power because it reliefs some of the restriction. Its like having a water hose with several knots, if u undo the knots closest to the end than the ones closer to the faucet, more water will flow out but theres still going to be alot of restriction, if the knots closer to the faucet are undone rather than the ones closer to the end, again more water will flow out but still some restriction will be there.
So both of you guys are correct but the way I see it, you have to add a full exhaust(headers, cats, Y-pipe, I-pipe, cat-back) To get a larger gain.

TheBlurLS1

iTrader: (8)

The pic attatched in this post is exactly what bullets look like on the inside.......... in case anybody was wondering

Redneck Z

iTrader: (3)

What makes you say this? Catbacks don't add 2-5 bhp...it's alot more than that. In fact they are dyno proven to add alot more than 2-5rwhp. Also 300 bhp/ton said the y-pipe is a significant restriction and the catback isn't??? Thats backwards. What did 300 say that is more correct than what I've said. Everything I've said is supported by fact, not fancy words. Also, I understand what you are saying about the restriction's closer to the motor, but I don't care if the Y pipe is closer to the motor than the catback. The catback is still MUCH more of a restriction than the Y-pipe. This has been proven many times.