GMPP Axle Back Does NOT Fit w/ GFX - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

My 5th · 04-25-2010, 01:45 PM

This is for those of you with GFX who may have been swayed by some on this forum stating the GMPP axle back would fit. They do NOT fit, at least without serious modifications.

I went to my dealer Friday to have the off-road package installed. The dealer eye-balled the setup and expressed his reservations they would not fit. Buoyed by the opinions expressed here by 2 other posters I said "Nah, no problem--they'll fit, go ahead and cut." So they cut where the instructions said to cut. To really fit the 4" tips, (which are really 4.5" BTW) into the GFX housing the muffler needs to move forward several inches so the tips will fit in the dished-out area. This can only be done if you cut more off the pipe, which you can't do because you run into the hanger rods on the pipe. Or, if you manage to do it some other way the muffler hangers on the mufflers will be too far forward to align with the hangers on the rear of the frame--requiring cutting and re-welding. Neither of which I nor the dealer were willing to do.

So I had them install the more sedate package with no tips, figuring I could easily find some good tips.

2 days, 6 shop visits, and 4 hours internet shopping later, I found a couple of candidates which a local shop could order in overnight to try to fit.

I found a decent set of stainless oblong angle-cut rolled edge tips that a local Magnaflow (Master Muffler) shop was able to make fit. They actually look pretty good--almost as good as MBRP's rectangular tips. (Pics to follow.)

Now for the sound review: Deeper rumble, only about 10% louder, still too quiet. Maybe they'll break-in a little louder. Maybe an X-Pipe will help? Not ready yet for LT headers and high-flow cats, but that should help too.

Moral of the story: Don't believe everything you hear on the internet.

My 5th · 05-05-2010, 05:54 PM

Here's a pic of my custom tips. Sorry for the poor quality from my cell phone

chris@borla · 05-05-2010, 06:37 PM

Quote:

Originally Posted by My 5th

This is for those of you with GFX who may have been swayed by some on this forum stating the GMPP axle back would fit. They do NOT fit, at least without serious modifications.

I went to my dealer Friday to have the off-road package installed. The dealer eye-balled the setup and expressed his reservations they would not fit. Buoyed by the opinions expressed here by 2 other posters I said "Nah, no problem--they'll fit, go ahead and cut." So they cut where the instructions said to cut. To really fit the 4" tips, (which are really 4.5" BTW) into the GFX housing the muffler needs to move forward several inches so the tips will fit in the dished-out area. This can only be done if you cut more off the pipe, which you can't do because you run into the hanger rods on the pipe. Or, if you manage to do it some other way the muffler hangers on the mufflers will be too far forward to align with the hangers on the rear of the frame--requiring cutting and re-welding. Neither of which I nor the dealer were willing to do.

So I had them install the more sedate package with no tips, figuring I could easily find some good tips.

2 days, 6 shop visits, and 4 hours internet shopping later, I found a couple of candidates which a local shop could order in overnight to try to fit.

I found a decent set of stainless oblong angle-cut rolled edge tips that a local Magnaflow (Master Muffler) shop was able to make fit. They actually look pretty good--almost as good as MBRP's rectangular tips. (Pics to follow.)

Now for the sound review: Deeper rumble, only about 10% louder, still too quiet. Maybe they'll break-in a little louder. Maybe an X-Pipe will help? Not ready yet for LT headers and high-flow cats, but that should help too.

Moral of the story: Don't believe everything you hear on the internet.

This is true. Who told you that they would?

skuttduck · 05-05-2010, 07:07 PM

Quote:

Originally Posted by chris@borla

This is true. Who told you that they would?

I always thought that they would. Unless this is different than the OP.

http://www.gmaccessorieszone.com/Che...1%5Btype%5D=gm

V8 (LS3 and L99) Exhaust Upgrade Kit, No Tip - For Use on Vehicles WITH Ground Effects

djsnoflake · 05-05-2010, 07:19 PM

If you have GFX, you have to get the ones with no tips. I am pretty sure it says that in the GM literature somewhere, even

2SSRSB · 05-05-2010, 11:15 PM

Quote:

Originally Posted by djsnoflake

If you have GFX, you have to get the ones with no tips. I am pretty sure it says that in the GM literature somewhere, even

It does. I bought the 'no tips' version and they fit fine. Had to buy aftermarket (Borla) tips, though.

djsnoflake · 05-06-2010, 12:09 AM

Yeah I got MBRP ones. They're badass

My 5th · 05-07-2010, 01:00 AM

Quote:

Originally Posted by chris@borla

This is true. Who told you that they would?

I think their names were Prankster1 and Prankster2. I wanted to believe they would fit, and even though you would think most GM dealers would know what they're talking about, they've been wrong before.

I really wanted your Type S axle back, but couldn't find a local dealer, and I didn't have the patience to wait for mail order, which would have to be delivered to my work, not home (that's a whole nuther story). The one Utah dealer listed on your web site (a Goodyear Tire shop) said they are no longer a Borla dealer. So I "settled" for the GMPP. Maybe in a couple years when I can afford a maggie I'll go to LT's and a complete new 3" system.

MarylandSpeed · 05-07-2010, 01:09 AM

The stock tips rubbed on mine...could not wait to get them off. I don't think any round tip is gonna fit in there right. This is not really a hard thing to find out without installing. I mean just stick the tips up to the bezel before the install and it is obvious there is no way they would go through.

My 5th · 05-09-2010, 01:00 AM

The stock tips are 3-3/4" in diameter. A 4" tip would fit, as the stock tips have at least 1/2" or more of clearance, top & bottom. The problem is the 4" tips are actually almost 4 1/2". Then you have to move the tip forward to take advantage of the "bumps" in the GFX stainless housing to get the maximum clearance. The stock mufflers have the tips almost touching the muffler body, with almost no pipe because the stock cans are almost up against the diffuser. Oh well, what I've got works, it has more rumble than stock and seems to be getting a little louder every day.

Bell040 · 05-09-2010, 01:14 AM

It clearly states that you need to buy the kit without tips if you have the GFX.

04-25-2010, 01:45 PM	#1
My 5th Drives: 2010 2SS/RS M6 Black on Black Join Date: Jan 2010 Location: Global Citizen Posts: 1,243	GMPP Axle Back Does NOT Fit w/ GFX This is for those of you with GFX who may have been swayed by some on this forum stating the GMPP axle back would fit. They do NOT fit, at least without serious modifications. I went to my dealer Friday to have the off-road package installed. The dealer eye-balled the setup and expressed his reservations they would not fit. Buoyed by the opinions expressed here by 2 other posters I said "Nah, no problem--they'll fit, go ahead and cut." So they cut where the instructions said to cut. To really fit the 4" tips, (which are really 4.5" BTW) into the GFX housing the muffler needs to move forward several inches so the tips will fit in the dished-out area. This can only be done if you cut more off the pipe, which you can't do because you run into the hanger rods on the pipe. Or, if you manage to do it some other way the muffler hangers on the mufflers will be too far forward to align with the hangers on the rear of the frame--requiring cutting and re-welding. Neither of which I nor the dealer were willing to do. So I had them install the more sedate package with no tips, figuring I could easily find some good tips. 2 days, 6 shop visits, and 4 hours internet shopping later, I found a couple of candidates which a local shop could order in overnight to try to fit. I found a decent set of stainless oblong angle-cut rolled edge tips that a local Magnaflow (Master Muffler) shop was able to make fit. They actually look pretty good--almost as good as MBRP's rectangular tips. (Pics to follow.) Now for the sound review: Deeper rumble, only about 10% louder, still too quiet. Maybe they'll break-in a little louder. Maybe an X-Pipe will help? Not ready yet for LT headers and high-flow cats, but that should help too. Moral of the story: Don't believe everything you hear on the internet. __________________ Meh

05-05-2010, 05:54 PM	#2
My 5th Drives: 2010 2SS/RS M6 Black on Black Join Date: Jan 2010 Location: Global Citizen Posts: 1,243	Here's a pic of my custom tips. Sorry for the poor quality from my cell phone Attached Images __________________ Meh

05-09-2010, 01:00 AM	#10
My 5th Drives: 2010 2SS/RS M6 Black on Black Join Date: Jan 2010 Location: Global Citizen Posts: 1,243	The stock tips are 3-3/4" in diameter. A 4" tip would fit, as the stock tips have at least 1/2" or more of clearance, top & bottom. The problem is the 4" tips are actually almost 4 1/2". Then you have to move the tip forward to take advantage of the "bumps" in the GFX stainless housing to get the maximum clearance. The stock mufflers have the tips almost touching the muffler body, with almost no pipe because the stock cans are almost up against the diffuser. Oh well, what I've got works, it has more rumble than stock and seems to be getting a little louder every day. __________________ Meh

05-09-2010, 01:14 AM	#11
Bell040 Drives: 2SS/RS - Black - GFX Join Date: Nov 2008 Location: B'ham, Alabama Posts: 2,458 View My Garage	It clearly states that you need to buy the kit without tips if you have the GFX. __________________ Ordered: 10-13-08 Built: 3-30-09 (#1691) Recieved: 6-12-09 Blacked out, Cammed (Lunati Voodoo 233/245, .578/.598 @114°, +4°), ARH LTs, VR OTR CAI, Cutouts, and lots of other fun mods.

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05-07-2010, 01:09 AM	#9
MarylandSpeed Account Suspended Drives: 2012 ZL1 & 2010 2SS/RS Join Date: Jul 2009 Location: Maryland Posts: 3,378	The stock tips rubbed on mine...could not wait to get them off. I don't think any round tip is gonna fit in there right. This is not really a hard thing to find out without installing. I mean just stick the tips up to the bezel before the install and it is obvious there is no way they would go through.