What is the difference between an axle and full catback exhaust??

[2k1SilverCelica]

can anyone explain please? thanks

[chameleon]

A cat back exhaust replaces the exhuast from the catalytic converter all the way to the back of the car. An axle back exhaust replaces the exhuast from the axle to the back of the car. Thats really the only difference. A cat back system will replace more of the original exhaust pipes with aftermarket ones. If you are trying to build horse power and are running a larger diameter pipe to do so, you would probably get better results from a cat back system because more of the pipe would be replaced by the aftermarket diameter piping. An axle back system is easier to install and would cost less because less of the exhaust is being replaced.

[Kit99bar]

the axel back goes back from the axel (the rear wheels)

the cat back goes back from the cat.


Le me know if you don't understand and I'll try to explain it in not technical terms for you.

[2k1SilverCelica]

ok i get it. Thanks a lot, but is it true that all the exhaust for the celica is axle back?? Because i just bought the TRM exhaust n i thought it was a full catback. Did i get ripped off or somthing cuz i paid like 490 for it, isn't that kinda exensive for just an axle back?? any reply would be appreciated.

[chameleon]

Yes, all aftermarket Celica exhausts are axle back. Except for maybe the Kazuma, that might be cat back but I'm not sure. Anyway, you have to take the performance of the stock exhaust into consideration. The stock exhuast performs very very well and there really is no need for a cat back exhuast. A cat back exhaust will cost more but give you relatively no real performance gains over an axle back.

490 isn't a lot for a Celica exhuast. Every thing for the celica is really expensive. I spent over $500 for my TRD exhuast. Don't worry, over time you just get used to it and won't even realize that you are paying twice as much as you should be paying for parts :(

[Kit99bar]

the Kazuma exhaust can be any length you want it to be.

you have to cut your exhaust off and weld the kazuma into it's place.

most people do it catback with the kazuma. after the cat on the celica is a silencer. IF you do the kazuma cat back you will lose this silencer. Thus huge loudness. The kazuma can be connected after the silencer.

I have the TRM and I dont' like it. Too big and heavy. I want to sell it and get a custom straight through axel back exhaust. prob get this for 100 to 200 bucks

and Chameleon is right, the stock celica exhaust is just fine and big enough. everything up to the axel is plenty big.

[MaasNeotek]

Originally posted by chameleon
Yes, all aftermarket Celica exhausts are axle back. Except for maybe the Kazuma, that might be cat back but I'm not sure. Anyway, you have to take the performance of the stock exhaust into consideration. The stock exhuast performs very very well and there really is no need for a cat back exhuast. <SNIIIIIIP>
490 isn't a lot for a Celica exhuast. Every thing for the celica is really expensive. I spent over $500 for my TRD exhuast. Don't worry, over time you just get used to it and won't even realize that you are paying twice as much as you should be paying for parts :(

OI! Hotay. Anyone here who thinks that huge muffler right ahead of the axle is efficient, stand up so that it's easier for me to pimp slap your dumb ass.

90% of the Exhaust systems available (including the trd/kazuma) are CATBACK. (Which means that they bolt on behind the cat).

The remaining 10% aren't exhaust systems and are more likely just mufflers.

Saying that there isn't much gain from a cat-back over an axle back is nuts. (PS - still trying to find an axle back - there's no flange on the stock muffler - therefore - it would have to be custom.)

Most aftermarket systems (the overpriced A'PEXi, TRD, Blitz etc) don't even upsize the piping. but bolt on to the stock post cat flange. If you are looking for one - look for a high flow system that removes that huge muffler just forward of the axle. My exhaust ($640CDN - Yes - you americans do the math... that under 450 shipped) is 2 3/4" Mandrel bent from the flange all the way to the tip, finishing in a tuned muffler/tip. I have yet to find someone who doesn't notice the improvement. The only system that wouldn't likely see an improvement is the kazuma. (Yeah yeah - dyno sheets are forthcoming. Canada doesn't have many...)

2-5 HP isn't uncommon from an exhaust upgrade, 5-7 quite possible with a high flow system. The only better option is to remove the 2 cats as well as adding a high flow system, and drive around with Check Engine lights.

Did I mention the weight savings when going to a high flow cat-back system? Take a feel of the weight of that stock exhaust system. JEEZUS. It's HUGE. You can save 8 pounds off the top.

[Kit99bar]

I disagree. The axel is the flange at the rear wheels. the celica's stock piping from the header all the way to the axel is big enough. it's just the part after the axel that sucks. and tha'ts why every ceilca exhaust is axel back, except for the kazuma that's cat back.

Originally posted by MaasNeotek


OI! Hotay. Anyone here who thinks that huge muffler right ahead of the axle is efficient, stand up so that it's easier for me to pimp slap your dumb ass.

90% of the Exhaust systems available (including the trd/kazuma) are CATBACK. (Which means that they bolt on behind the cat).

The remaining 10% aren't exhaust systems and are more likely just mufflers.

Saying that there isn't much gain from a cat-back over an axle back is nuts. (PS - still trying to find an axle back - there's no flange on the stock muffler - therefore - it would have to be custom.)

Most aftermarket systems (the overpriced A'PEXi, TRD, Blitz etc) don't even upsize the piping. but bolt on to the stock post cat flange. If you are looking for one - look for a high flow system that removes that huge muffler just forward of the axle. My exhaust ($640CDN - Yes - you americans do the math... that under 450 shipped) is 2 3/4" Mandrel bent from the flange all the way to the tip, finishing in a tuned muffler/tip. I have yet to find someone who doesn't notice the improvement. The only system that wouldn't likely see an improvement is the kazuma. (Yeah yeah - dyno sheets are forthcoming. Canada doesn't have many...)

2-5 HP isn't uncommon from an exhaust upgrade, 5-7 quite possible with a high flow system. The only better option is to remove the 2 cats as well as adding a high flow system, and drive around with Check Engine lights.

Did I mention the weight savings when going to a high flow cat-back system? Take a feel of the weight of that stock exhaust system. JEEZUS. It's HUGE. You can save 8 pounds off the top.

[MaasNeotek]

Double OI.

The 'axle' flange you are referring to, is ahead of the 'axle' and behind the cat. In fact, it's abbout 2 feet of 2 3/4" from the cat - and yes - it's fine. Which is why the cat back systems are so common. So realistically, we're both right. Most references to 'axle'-back exhausts are AFTER the axle, aka, new piping and tip from the muffler (that sits right ahead of the axle.)

I think axle back is a term created just for celica's. Anyone heard of it elsewhere?

[oodolbyoo]

I have a GT. I also have a Kazuma exhaust. The kazuma (uncut) connects directly to the cat. I opted to integrate the factory silencer into mine. It was way to loud for everyday use. Infact, it sounded like ****e without the silencer. In 1st gear it sounded like I was going 100MPH when In reality I was only at 2K going like 10.
The TRD exhaust bolts on at an intersection at the rear Axel. I also previously had this exhaust. No where near as loud. More or less just a highflow muffler system to me. You still have the factory piping from the cat to the axel. The TRD consists of a tip, a bit of mandrel piping and a high flow muffler.
Running with Kazuma I have no muffler. It comes only with a resinator. I have all mandrel bent pipes that are thicker and better quality than what you would have with an "Axle Back" exhaust system. The way the Celica's exhaust system is set up with the cat so deep into the engine, The kazuma is more or less a full exhaust.
Looking back now, I would have just saved money and went with a straight pipe or unbolted. The power gain wasnt nearly what I thought it would be. I felt alot more from teh CAI