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I have a 2007 regular cab shortbox 4X4 with a hemi. Looking for exhaust help with the price of catbacks in Canada I was wondering if anyone with a aftermarket muffler install could give me info on performance gains also types installed. Thanks
 

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I put a Magnaflow 14" muffler on mine.Used the stock tailpipes,they are stainless and at 2 1/4",flow well,not a whole lot to be gained by going with a full cat-back(imo).Sounds much better than stock...:smileup::smileup:..Rob
 

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If you do a muffler swap you will essentially have the exact same thing as the cat back. The stock exhaust is actually very good, just a restrictive muffler, restrictive y pipe, and restrictive manifolds...
 

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The stock piping is the exact same as the cat back piping, same size same bends etc.


If you can't get a cat back stupid check, throw in a muffler and call it a cat back!
 

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Throw the muffler on and get the muffler shop to make a better y pipe, the stock one is crushed where the two sides meet.
 
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