Gmmg, stock manifolds, no cats

**Deaton52** · 11-03-2007, 05:15 PM

Hi. Pretty soon I am going to put a Gmmg catback on my car. Eventually I am going lt's and an ory; however, that won't be untill later next year. In the meantime I was wondering how would stock manifolds with no cats and the gmmg sound. I would put a bullet in the i-pipe, but was wondering if it would still be raspy even though it's on stock manifolds, with no cats, and a bullet in the i-pipe. Also what are some different bullets I should use. I was thinking sweet thunders, magnaflow, or flowmaster 1-chamber.

**nhraformula** · 11-04-2007, 04:49 AM

bullets will change the tone a bit but rasp will still be there

**01camaross** · 11-04-2007, 11:27 AM

i have Lt's and ORY going to my gmmg and it sounds good, very loud but not too much rasp. I think you will be alright to just try it and if you don't like how it sounds you can always add a bullet

**ApexVIII** · 11-04-2007, 04:04 PM

i have LT catted Y its raspy but it sounds good.!

**Deaton52** · 11-04-2007, 04:05 PM

I was wondering though would the rasp differ from stock manifolds to Lt's or does rasp just depend on cats

**Bouvers** · 11-04-2007, 05:14 PM

I'd like to start off by stating I don't consider myself an expert on the subject but in my opinion I think the biggest deciding factor to rasp is cats, I'm ORY and the rasp is there, however, LT's also add to it. As for a previous comment about someone stating that bullets do not get rid of rasp I completely disagree with this comment. I've seen this done and it helps what I intend on doing is putting a borla bullit, they have the cleanest sound out of any exhaust. Although do expect a considerable volume reduction aswell. This is only my personal experience with Borla bullits i would expect other brands such as magnaflow and slp to not do such a good job of cleaning the sound as borla.

**nhraformula** · 11-04-2007, 05:43 PM

Originally Posted by Bouvs

I'd like to start off by stating I don't consider myself an expert on the subject but in my opinion I think the biggest deciding factor to rasp is cats, I'm ORY and the rasp is there, however, LT's also add to it. As for a previous comment about someone stating that bullets do not get rid of rasp I completely disagree with this comment. I've seen this done and it helps what I intend on doing is putting a borla bullit, they have the cleanest sound out of any exhaust. Although do expect a considerable volume reduction aswell. This is only my personal experience with Borla bullits i would expect other brands such as magnaflow and slp to not do such a good job of cleaning the sound as borla.

i tried the whole bullet thing because i have a cam, long tubes and catless y pipe. it changed the tone somewhat, but rasp was still there.

i changed to a hooker catback, rasp was gone.

**Y2KPewterSS** · 11-04-2007, 05:44 PM

Originally Posted by 01camaross

i have Lt's and ORY going to my gmmg and it sounds good, very loud but not too much rasp. I think you will be alright to just try it and if you don't like how it sounds you can always add a bullet

Same setup as me, I get rasp around 2400-2600 but sounds great before and after that.

**Bouvers** · 11-04-2007, 05:47 PM

which cat-back did you have on before? maybe thats whats making the difference, the borla bullet that cleared up all the rasp on the car I'm talking about had corsa cat-back.

**nhraformula** · 11-05-2007, 05:17 AM

had the magnaflow

**180ls1** · 11-07-2007, 08:43 PM

if you want deep sound the 1 chamber flowmasters are really deep sounding and still flow well. a resonator type bullet will all be the same just about so just go with the dynomax ones they are the cheapest. but if you have the money i would go with the borla xr-1 mufflers they are extremely good flowing and still provide more torque then bullets