Magnaflow exhaust question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jcobra · 03-24-2011, 07:32 PM

Last week I put the magnaflow axle back 16582 muffler deletes on my ss for two reasons. 1 I wanted it loud and 2 I was getting the rattle from underneath that is discussed in another section on here. The axle back sounds good but I'm still getting the damn noise. I'm taking it in tomorrow morning to the dealer. I'm not sure what route to go here. If they replace the factory exhaust I'm gonna have to reinstall the axle back. There's also the possibilty they deny it because of the magnaflows even though the sound is coming from the middle of the car and not behind the axle. Which brings me to my next point, the magnaflow 16580 is the full exhaust with the same axle back portion that I already purchased and installed. Is there much difference between the full magnaflow exhaust and what i currently have (factory exhaust with muffler deletes). Id also like to know if i can purchase the rest of the magnaflow system as it's the same as what I already have from the axle back with out having to buy the entire system and have 2 axle backs. Sorry for long thread but this noise is really pissing me off considering my car has 1400 miles on it.

Bell040 · 03-24-2011, 07:37 PM

take it to a muffler shop and get it on a lift... should be easy to find the source of the rattle. I had my share of rattles.

Jcobra · 03-24-2011, 07:40 PM

I can only produce the sound with the car under load or hitting bumps.

Jabs · 03-24-2011, 08:09 PM

I just put the catback competition Magnaflow exhaust. I have to say I thought it would sound louder... But you can feel a slight boost in power.

Bell040 · 03-24-2011, 08:21 PM

Quote:

Originally Posted by Jcobra

I can only produce the sound with the car under load or hitting bumps.

i bet it's a heatshield... you will see it. Look for less than 1/2" clearance to anything.

I had to take one of my heatshields off. I could have bent it, but it didn't look like it was doing anything but rattling.

Jcobra · 03-24-2011, 08:25 PM

I was underneath the car this afternoon and the only thing I could get to make a similar noise was the heat shield. None of them seemed loose though.

Bell040 · 03-24-2011, 08:33 PM

heatshield is probably not moving... shake the exhaust and see if it hits the heatshield... Mine was.

Jcobra · 03-24-2011, 08:40 PM

I tried and and nothing. It happens at over 3500 rpm or over bumps. It's tough to do much under there lying on you back in the garage. I made sure everything was tight on the axle back so that's not it either. When I hit big enough bumps i can feel it in the console area near the shifter.

csjcsj · 03-24-2011, 08:42 PM

Yeah mine makes a rattling noise also! Didn't do it till I put LT's on, then it started! This might help solving my problem! Never thought of a heat shield!

caverman · 03-24-2011, 10:01 PM

Quote:

Originally Posted by Jcobra

the same as what I already have from the axle back with out having to buy the entire system and have 2 axle backs.

I think what are trying to say is what would it take to make your axle back in to basically the Magnaflow 2.5" Comp cat-back. If so, then all you need to do is add an Magnaflow #1386 resonated x-pipe. Thats what I did the first time.....made mine into a cat-back.
http://www.camaro5.com/forums/showthread.php?t=64964

Quote:

Originally Posted by Jabs

I just put the catback competition Magnaflow exhaust. I have to say I thought it would sound louder... But you can feel a slight boost in power.

Which system comp cat-back do you have? The 2.5" Comp cat-back should basically be a muffler delete and resonated x-pipe. You should definately hear that. Not that it's real loud but should make a noticable difference.

Now, if you have the Magnaflow 3" Comp cat-back and you are still running factory headers and cats....then that is a known for that exhaust. All you have do is add some headers with some HF cats and it changes everything.

Jcobra · 03-25-2011, 06:34 AM

I just have the axle backs. Everything else is factory.

Buick1959 · 03-25-2011, 06:59 AM

Is there a difference between cat back and axel back ?

Jcobra · 03-25-2011, 07:05 AM

Cat back runs from the headers back and an axle back runs from just in front of the rear axles back.

caverman · 03-25-2011, 08:04 AM

Quote:

Originally Posted by Jcobra

I just have the axle backs. Everything else is factory.

Correct....but from what I took out of your question was what it took to make it into a cat-back. If you have a #1386 resonated x-pipe to your system you'll basically have the same thing as Magnaflow's 2.5" Comp cat-back system.

03-24-2011, 07:37 PM	#2
Bell040 Drives: 2SS/RS - Black - GFX Join Date: Nov 2008 Location: B'ham, Alabama Posts: 2,458 View My Garage	take it to a muffler shop and get it on a lift... should be easy to find the source of the rattle. I had my share of rattles. __________________ 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. Last edited by Bell040; 03-24-2011 at 08:18 PM.

03-24-2011, 08:09 PM	#4
Jabs Drives: 2010 Black Camaro SS Stage 2 Join Date: Nov 2010 Location: Mclean VA Posts: 604	I just put the catback competition Magnaflow exhaust. I have to say I thought it would sound louder... But you can feel a slight boost in power. __________________

03-24-2011, 08:33 PM	#7
Bell040 Drives: 2SS/RS - Black - GFX Join Date: Nov 2008 Location: B'ham, Alabama Posts: 2,458 View My Garage	heatshield is probably not moving... shake the exhaust and see if it hits the heatshield... Mine was. __________________ 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.

03-24-2011, 08:42 PM	#9
csjcsj Drives: 2010 Camaro SS/RS 6spd Join Date: Sep 2009 Location: Jefferson, Ga Posts: 4,399 View My Garage	Yeah mine makes a rattling noise also! Didn't do it till I put LT's on, then it started! This might help solving my problem! Never thought of a heat shield! __________________

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03-24-2011, 07:32 PM	#1
Jcobra Drives: 2010 2ss/rs M6 Join Date: Nov 2010 Location: Il Posts: 931	Magnaflow exhaust question Last week I put the magnaflow axle back 16582 muffler deletes on my ss for two reasons. 1 I wanted it loud and 2 I was getting the rattle from underneath that is discussed in another section on here. The axle back sounds good but I'm still getting the damn noise. I'm taking it in tomorrow morning to the dealer. I'm not sure what route to go here. If they replace the factory exhaust I'm gonna have to reinstall the axle back. There's also the possibilty they deny it because of the magnaflows even though the sound is coming from the middle of the car and not behind the axle. Which brings me to my next point, the magnaflow 16580 is the full exhaust with the same axle back portion that I already purchased and installed. Is there much difference between the full magnaflow exhaust and what i currently have (factory exhaust with muffler deletes). Id also like to know if i can purchase the rest of the magnaflow system as it's the same as what I already have from the axle back with out having to buy the entire system and have 2 axle backs. Sorry for long thread but this noise is really pissing me off considering my car has 1400 miles on it.

03-24-2011, 07:40 PM	#3
Jcobra Drives: 2010 2ss/rs M6 Join Date: Nov 2010 Location: Il Posts: 931	I can only produce the sound with the car under load or hitting bumps.

03-24-2011, 08:25 PM	#6
Jcobra Drives: 2010 2ss/rs M6 Join Date: Nov 2010 Location: Il Posts: 931	I was underneath the car this afternoon and the only thing I could get to make a similar noise was the heat shield. None of them seemed loose though.

03-24-2011, 08:40 PM	#8
Jcobra Drives: 2010 2ss/rs M6 Join Date: Nov 2010 Location: Il Posts: 931	I tried and and nothing. It happens at over 3500 rpm or over bumps. It's tough to do much under there lying on you back in the garage. I made sure everything was tight on the axle back so that's not it either. When I hit big enough bumps i can feel it in the console area near the shifter.

03-25-2011, 06:34 AM	#11
Jcobra Drives: 2010 2ss/rs M6 Join Date: Nov 2010 Location: Il Posts: 931	I just have the axle backs. Everything else is factory.

03-25-2011, 06:59 AM	#12
Buick1959 Drives: '11 SS RS LS3 IOM conv Join Date: Mar 2011 Location: Long Island, New York Posts: 23	Is there a difference between cat back and axel back ?

03-25-2011, 07:05 AM	#13
Jcobra Drives: 2010 2ss/rs M6 Join Date: Nov 2010 Location: Il Posts: 931	Cat back runs from the headers back and an axle back runs from just in front of the rear axles back.