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Discussion Starter · #1 ·
yes im a complete noob and flame all you want, but i've still gotta learn sometime... so the question is whats the difference between the two?
 

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When you hear people talking abot down pipes they prob bought a cat back system. A 3" turbo back exhaust will replace everything from the 02 housing back. A 3" cat back will still leave a bottle neck of whatever size downpipe/o2 housing is left.
Turbo back > cat back
 
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