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Question, how much HP increase co you get with a full cat-back exaust, and how much for just a muffler? also how hard is it to install a cat back thanks:

 
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Without a hydraulic lift, it's going to be a difficult if not impossible job to install the exhaust. If you have a lift, it's relatively easy, but the brackets that hold the muffler up can be a pain since you normally need to do some welding. With a good exhaust system, you could expect a 5-8 hp increase if you're lucky.

 
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since we are in the cat-back topic, let me ask this

is there any difference between a full cat-back system and a custom pipe with a performance muffler?
which is cheaper? full cat or custom?

 
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I trust a full cat more. A custom setup is designed by a shop who typically doesn't do as much research and development as big names like Greddy who make exhaust systems specific to your car. You might actually decrease backpressure with the wrong setup and hurt your performance. Custom exhaust can vary in price depending on the shop.

 
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Either way, its alot of jack for 5-8 horsies............and 5 to 8 is a best scenerio increase, I doubt its an average increase.

 
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go to a shop that does ONLY exhaust installs, usually the owner of the shop knows what he's doin. Local guy here can install full catback piping with ur choice of muffler for $100- the cost of the muffler. Great deal IMO, All of us go to his shop to have our exhausts done.

 
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Oh btw, in any case, greddy, apexi, hks will still always have better catbacks, but if you are looking for sound/moderate performance and not all out racing then a local shop installed catback will be fine

 
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ANY mandrel bent straight through muffler equipped cat-back will give you between 5 and 7% increase in horsepower
It all depends on the starting Hp#'s ....Custom made systems are also pretty good , the only downfall is the shop will not be able to provide a mandrel-bent one piece-pipe, the can "manufacture" there own mandrel-bent system by using "universal" j and u bends, basically cutting and welding several sections as necessary. Most shops won't even do this though, they use "hydraulic" benders that reduce pipe diameter wherever they need to make a "turn" in the system.
[IMG]i/expressions/face-icon-small-smile.gif[/IMG]

 
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thanks for the info is it 5hp or 5%? sounds like its cheaper just to get a nice sounding mufler?

 
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In some ways it is better to get custom, for the main reason of money, it also can give you a really good sound.

 
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yea, get a custom 2.25 or 2.5 pipe with a muffler. i got a custom 2.25 pipe with rytek muffler..sounds really good and
i could feel the acceleration and horses bustin in![IMG]i/expressions/face-icon-small-smile.gif[/IMG]
and it also save me alot for other mods i want to get!

2k1 Honda Civic EX COUPE
PIAA super plasma
Polarg turn signal *icy blue*
Aztekka taillights
custom exhaust with Rytek muffler ^_^
APC racing lamp with hyperwhites