Right now I'm stock, but future plans include LTs, ORYs, Header and Cam, so I need something that will sound good throughout the buildup and into the future. Considering everything from sound to flow to appearance. Here's my attempt at beating the dead horse. Just wanted to know how everyone would fall on this one. Thanks.

 

I have GMMG on my car(with LT's,and CATTED Y!)..I had the Borla on my 96 Z28. I like the GMMG better, but if you are going with an ORY, the Borla may be your best option...with the plates, you can adjust how much exhaust goes out the straight pipe, and how much goes through the muffler. Some people say the GMMG with ORY is TOO loud.

 

Of those two, GMMG.

 

Go with catted y's

 

I had the GMMG and ran it without cats for one week and could not take the farm truck sound anymore. Added the cats (FLP's with removeable cats) and it was music. The exhaust is the BEST sounding IMO and was designed to be used with cats. Go to ls1sounds.com and listen to some clips.

 

GMMG is the only catback I've heard on a stock LS1 to completely stroker, or heads/cam/ wtf ever... it sounds amazing no matter what you do to it... if only I could afford it... lol

 

I would take the GMMG over Borla anyday of the week. GMMG is much better than what borla has to offer for the price.

 

High flow cats and GMMG!!! It's not even a close call!

 

Based solely on other peoples posts...
GMMG for sound, if you don't mind it being loud with the headers and ORY you are going to add; or go Borla if adjustability is what you're after.

 

Having sold my Borla last year, and now have a Gmmg I would have to
say I prefer the Gmmg.

 

Go with the adjustable Borla. If you feel like being quiet all you is throw the restrictor plate on there and you go. Or if you feel like being loud take off the plate. It has about 4 plates to experiment with.

 

I just sold my Borla in favor of a Hooker catback. With the LT's and ORY, the Borla had WAY too much rasp for my liking. Therefore, I voted GMMG. Never heard a GMMG catback in person, but the clips that I have heard online sound good.

Good luck
Andy

 

i wouldnt run either without cats. i vote gmmg but with cats

 

all a gmmg cat back is a slp loud mouth , the head guy from slp left started gmmg if you look thay are almost excatly the same.

 

borla sounds good on true duals but gmmg sound best for what you are talkin about

 

Between those two... GMMG. BUT do not forget about Corsa Premium Pro I've had GMMG and prefer my Corsa on every aspect. Looks, sound, and performance. BTW, my car is heavily modded and running it with LT and ORY... definately LOUD but sounds good. You can always throw in cats to tone it down some.

 

Should have let me know Andy, i have one

 

if you are considering resale value also , GMMG is a good choice as everybody talk so much about them , you could resale in a few hours on ls1tech.com and not loose lots of money
I thought you could use the info\
well I have a gmmg on stock manifold and debating right now on what to di with it , LTs , cats or no cats, etc....
I think the tips look good too , the optional one I mean
GMMG !!!!!!!!!!!!

 

I don't agree with that, the loudmouth resonator has no baffles in it at all, hence why it sounds like *** with LT & ORY. The GMMG mufflers are a chambered style, which look like this

 

I agree, those are NOT the same exhaust.