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Magnaflow to Gmmg

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Old Jul 15, 2007 | 10:56 PM
  #21  
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It will bolt up fine. I HIGHLY recommend cats with LTs and a GMMG. While I've only heard the ORY clips on the internet, with cats there is ZERO rasp. I have some clips in my sig of both stock manifolds and Longtubes/Catted Y with a GMMG.
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Old Jul 17, 2007 | 11:51 PM
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I don't mean to argue either but my car felt seat of the pants slower with the GMMG as well (after i took the magnaflow off). It wasn't just at low rpms. Throughout the powerband it felt slower. I definatly like the sound of the gmmg better though. It has a 3 inch pipe underneath but once you get to the chambers it is quite a bit smaller from there on out. I am thinking it is 2.25 or 2.5, I don't remember off the top of my head but I could go measure it if need be.
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Old Jul 18, 2007 | 12:24 AM
  #23  
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i really want to find a good sound clip w/cats
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Old Jul 18, 2007 | 01:24 AM
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of the magnaflow or gmmg?
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Old Jul 18, 2007 | 11:47 AM
  #25  
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I have clips of my lt's, catted y, and magnaflow.

I think you'll be happier and save some money just by adding cats to your existing setup.

GMMG is way overhyped.

Last edited by joblo1978; Jul 18, 2007 at 12:04 PM.
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Old Jul 18, 2007 | 03:24 PM
  #26  
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You guys that have the magnaflow do you what what size the exits on the muffler are I got the dual/dual version and mine only looked to be 2.25".
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Old Jul 18, 2007 | 03:29 PM
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Lookin on the website it has the same muffler here is the system I have.
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Old Jul 18, 2007 | 03:51 PM
  #28  
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Originally Posted by SpdFrk1990
Lookin on the website it has the same muffler here is the system I have.
Wow! First time I've seen their Dual Dual setup. I bought mine a long time ago with the ugly 3.5 inch tips, had to put my own tips on it.

That is an awesome looking setup!
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Old Jul 18, 2007 | 09:52 PM
  #29  
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Great set up & it makes good power , just remove the cats if you want to hear it with stock manifolds though.
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Old Jul 18, 2007 | 10:51 PM
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Im running it with lt's and a ory and it sounds pretty good im not too excited about partial throttle but WOT sounds great.
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Old Jul 18, 2007 | 11:23 PM
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I was referring to gmmg w/o cats.
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Old Jul 20, 2007 | 01:39 AM
  #32  
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Originally Posted by SpdFrk1990
Im running it with lt's and a ory and it sounds pretty good im not too excited about partial throttle but WOT sounds great.
Well yeah, no cats make you raspy sounding.

Are those the clamps that came with the Magnaflow?

Sure looks they improved them on the newer kit as well, the ones that came with mine were half assed U clamps, those look nice!

Here's the Magnaflow with cats and LT's....in a tunnel

http://youtube.com/watch?v=YZ2-fdRYRAg

Doesn't sound all that different than a GMMG to me...
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Old Jul 20, 2007 | 03:28 AM
  #33  
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I really dont notice much rasp at all on mine like I have some of the magnaflows online.
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Old Jul 20, 2007 | 10:30 AM
  #34  
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all magnaflows are straight-thru no chambers.
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