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Discussion Starter · #1 ·
Ok,
I want a deeper sound from my truck and I see there are mufflers (I know what a muffler is) and then there are 'cat back' systems. What is a cat back system and why does it cost so much?
 

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Discussion Starter · #2 ·
nevermind... I should have Googled it earlier.

http://en.wikipedia.org/wiki/Exhaust_pipe#Cat-back

Cat-back

Cat-back (also cat back and catback) refers to the portion of the exhaust system from the outlet of the catalytic converter to the final vent to open air. This generally includes the pipe from the converter to the muffler, the muffler, and the final length of pipe to open air.

Cat-back exhaust systems are a very popular aftermarket performance enhancement. They generally use larger diameter pipe than the stock system. Good systems will have mandrel-bent turns that allow the exhaust gas to exit with as little back pressure as possible. The mufflers included in these kits are often glasspacks, again to reduce back pressure. If the system is engineered more for show than functionality, it may be tuned to enhance the lower sounds that are lacking from high-RPM low-displacement engines.
 

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Most exhaust shops have a mandrel machine and they can make an exhaust for you. I personally like pipes that come out at the side.
 
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