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Hey, I'm faced with a difficult dicision. I could either pay $600 for GReddy EVO or I could pay $300 for a muffler and custom piping.

1. Will the custom exhaust get as much HP gain as the GReddy EVO would?

2. Which one will look better?

3. Which one will sound better (AKA loud, deep)?
 

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Well that depends on your piping and muffler, and silencer. To get the most hp out of a custom exhaust you want mandrel bent piping, and a muffler that does not have a louvered core. The sizing of the piping is important too. 2.25" is standard but you can go up to 2.5" with out too much penalty. But if you do things right a custom exhaust has to the potential to be better than the greddy in looks, hp and sound (db wise). All this will come for a price, but with careful planning you can minimize experimentation and get the best exhaust set up for less than the greddy. But is you don't want to do the homework, just buy the greddy.
 
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