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joevfx
Navel Member
Name: Joe
From: CA, Santa Monica
Joined: 22 Apr 2009
Posts: 110
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axle back or cat back system?
whast the difference between the 2? is one better then the other?
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Thu May 14, 2009 12:10 am |
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FalconGTHO
The Cameraman
Name: Alan
From: AZ, West Valley
Joined: 13 Dec 2006
Posts: 5275
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Absolutley no need for cat back. Axle backs are all thats needed since it only results in an improvement in sound and, depending on brand picked, some much needed weight loss.
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Thu May 14, 2009 12:48 am |
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joevfx
Navel Member
Name: Joe
From: CA, Santa Monica
Joined: 22 Apr 2009
Posts: 110
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axle back is ok in california?
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Thu May 14, 2009 1:14 am |
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FalconGTHO
The Cameraman
Name: Alan
From: AZ, West Valley
Joined: 13 Dec 2006
Posts: 5275
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Thu May 14, 2009 8:18 am |
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Coondog
Agent Orange
Name: Greg
From: CA, Hesperia
Joined: 20 Mar 2007
Posts: 3115
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Yes sir. Know matter what you get just make sure they have 4 inch chrome tips. Joe do your reseach around your town for the BEST muffler install shop. You want those tips even coming out the back of your GO. Your GOing to spent some bucks on the exhaust, don't get cheap on the installer.
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Thu May 14, 2009 8:23 am |
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veilside.mustang
Beaux Geaux
Name: Koji
From: CA, Long Beach
Joined: 14 Nov 2008
Posts: 2313
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quote:
Originally posted by FalconGTHO
Absolutley no need for cat back. Axle backs are all thats needed since it only results in an improvement in sound and, depending on brand picked, some much needed weight loss.
Alan, I think it depends on how you interpret what "cat-back" means. To me, "cat-back" implies the stock cats are left alone and everything from behind the cat all the way back to the exhausts tips are replaced. How it's replaced will impact the sound "quality", i.e, loudness? lol If that's a BOGOs goal - sound - cat-backs may the way to go. I do agree with you 100% that mufflers don't make hp.
On my last GT, an '04, the sound impact from swapping out the muffler changed noticeably. The '08 tips are part of the muffler. On my '04, at least there was a bit of tubing left after the exhaust left the muffler and before exiting. This helped "magnify" the sound...imho.
I replaced the JBA "axle backs" with the Roush Extreme Performance Exhaust, which are technically "cat-backs". It is still legal emissions-wise, but illegal as hell when it comes to sound levels. :-)
So in answering Joe's question, I feel there is a difference in what is being described between "axle back" and "cat-back", plus, there will be an impact on sound. What do you think, Alan?
One word of caution if you are a "noobie"... Be aware of the drone around 1900 to 2000 rpms. Research thoroughly. Also, camcorder sound clips don't do the actual sound any justice...
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veilside.mustang
'08 Mustang GT
Polished Roush blower, Roush one piece drive shaft and safety ring, Roush short-throw shifter and knob, Roush Trak Pak carbon fiber wing, ultra-rare Veilside body kit (love it or hate it), etc.
http://s412.photobucket.com/albums/pp201/veilside_mustang/
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Thu May 14, 2009 11:11 am |
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Tazman
LiveStrong
Name: Daryl Bender
From: PA, Lancaster
Joined: 17 Jan 2008
Posts: 2779
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Joe,
there's no need to replace the mid-pipes on your GO. They are 2 1/2" mandrel-bent SS tubes and they flow plenty well. Just replace the actual mufflers. You have many options when it comes to these. I have Flowmasters on mine, and it is a little louder at idle, and sounds real good from about 2500rpm and up. It does have a little drone at 1500rpm, but it's not objectionable.They have 3 1/2 polished SS tips that look good sticking out of the bumper.
These are easy to install yourself. Took me about 45 min. If you crawl under the car, you'll see what I mean.
_________________
'07 GT Premium
Mods:"Shelby" stripes(black), Flowmaster axlebacks, JLT CAI, SCT programmer w/ custom tune by CJPP, engine dressup items, 1/4 window louvers, side scoops, GT350 rocker stripe, shorty antenna, painted calipers, interior dressup items
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Thu May 14, 2009 3:18 pm |
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joevfx
Navel Member
Name: Joe
From: CA, Santa Monica
Joined: 22 Apr 2009
Posts: 110
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so i learned a litle bit by reading this , the picture Helped alot to0..
http://www.americanmuscle.com/mustang-exhaust-buyers-guide.html
so i understand that the cat back systems replace everythign after the catalytic converters but what do the axle back systems replace?
and how come Headers are illegal in california if the exhaust is still going through the catalytic converters?
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Thu May 14, 2009 6:26 pm |
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steve91386
The Boss
Name: Steve
From: RI, West Greenwich
Joined: 26 Feb 2007
Posts: 1521
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quote:
Originally posted by joevfx
so i learned a litle bit by reading this , the picture Helped alot to0..
http://www.americanmuscle.com/mustang-exhaust-buyers-guide.html
so i understand that the cat back systems replace everythign after the catalytic converters but what do the axle back systems replace?
and how come Headers are illegal in california if the exhaust is still going through the catalytic converters?
California law maintains that a factory catalytic converter can only be replaced under failure or defect. (this part may be inccorect >) but I also believe that California requires an OEM or OEM equivilant cat be installed when replacing a dead factory cat.
I found this all out when I was inquiring about registering my GO (currently registered in RI and with NO cats) in California. I was told that even if I purchased a set of long tubes and high flow cats, it would not pass the visual portion of the emissions testing.
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Thu May 14, 2009 8:08 pm |
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joevfx
Navel Member
Name: Joe
From: CA, Santa Monica
Joined: 22 Apr 2009
Posts: 110
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thats annoying, i mean if it passes the emmisions test why do they care if its the factory cats or after market cats. booo to california
quote:
Originally posted by steve91386
quote:
Originally posted by joevfx
so i learned a litle bit by reading this , the picture Helped alot to0..
http://www.americanmuscle.com/mustang-exhaust-buyers-guide.html
so i understand that the cat back systems replace everythign after the catalytic converters but what do the axle back systems replace?
and how come Headers are illegal in california if the exhaust is still going through the catalytic converters?
California law maintains that a factory catalytic converter can only be replaced under failure or defect. (this part may be inccorect >) but I also believe that California requires an OEM or OEM equivilant cat be installed when replacing a dead factory cat.
I found this all out when I was inquiring about registering my GO (currently registered in RI and with NO cats) in California. I was told that even if I purchased a set of long tubes and high flow cats, it would not pass the visual portion of the emissions testing.
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Thu May 14, 2009 8:56 pm |
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PEELTHS
Valencia Member
Name: Dave
From: CA, Ventura
Joined: 15 Jan 2007
Posts: 637
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Determine what your goal is first, is it to make it louder? Then you'll most likely be fine with axlebacks, and you can install those easily on your own with simple hand tools. Even if you have to loosen up the forward clamps for tip alignment issues you can do so with the help of a floor jack and jack stands. I went with the Ford Racing (Borla) stingers. They are NOT Cali legal. Other than annoying my neighbors in the early am  , I just keep my foot out of it in the presence of authorities...
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Thu May 14, 2009 9:09 pm |
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joevfx
Navel Member
Name: Joe
From: CA, Santa Monica
Joined: 22 Apr 2009
Posts: 110
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do you have any audio of the ford racing exhaust?
quote:
Originally posted by PEELTHS
Determine what your goal is first, is it to make it louder? Then you'll most likely be fine with axlebacks, and you can install those easily on your own with simple hand tools. Even if you have to loosen up the forward clamps for tip alignment issues you can do so with the help of a floor jack and jack stands. I went with the Ford Racing (Borla) stingers. They are NOT Cali legal. Other than annoying my neighbors in the early am , I just keep my foot out of it in the presence of authorities...
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Thu May 14, 2009 9:46 pm |
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FalconGTHO
The Cameraman
Name: Alan
From: AZ, West Valley
Joined: 13 Dec 2006
Posts: 5275
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quote:
Originally posted by Tazman
Joe,
there's no need to replace the mid-pipes on your GO. They are 2 1/2" mandrel-bent SS tubes and they flow plenty well. Just replace the actual mufflers. You have many options when it comes to these. I have Flowmasters on mine, and it is a little louder at idle, and sounds real good from about 2500rpm and up. It does have a little drone at 1500rpm, but it's not objectionable.They have 3 1/2 polished SS tips that look good sticking out of the bumper.
These are easy to install yourself. Took me about 45 min. If you crawl under the car, you'll see what I mean.
Beat me to it, Daryl.
_________________
GT parts wanted
My StreetFire site
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Thu May 14, 2009 10:34 pm |
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FalconGTHO
The Cameraman
Name: Alan
From: AZ, West Valley
Joined: 13 Dec 2006
Posts: 5275
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quote:
Originally posted by veilside.mustang
So in answering Joe's question, I feel there is a difference in what is being described between "axle back" and "cat-back", plus, there will be an impact on sound. What do you think, Alan?
One word of caution if you are a "noobie"... Be aware of the drone around 1900 to 2000 rpms. Research thoroughly. Also, camcorder sound clips don't do the actual sound any justice...
Daryl said what I wouldve said. Changing cat back pipes do nothing. The factory pipes are fine. one of the many things Ford got right on the S197. The only thing that changes sound after the cats are the muffs.
_________________
GT parts wanted
My StreetFire site
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Thu May 14, 2009 10:37 pm |
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FalconGTHO
The Cameraman
Name: Alan
From: AZ, West Valley
Joined: 13 Dec 2006
Posts: 5275
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Thu May 14, 2009 11:22 pm |
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