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Discussion Starter #1 (Edited)
i rolled my 07 titan and now i have an 08, on the 07 i removed the rear cats and muffler and installed the flowmaster Y and loved it lol, but now on the 08 im thinking of removing the rear cats and muffler and running more pipe out for duals, my question is will i lose enough performance or MPG to notice?
 

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i rolled my 07 titan and now i have an 08, on the 07 i removed the rear cats and muffler and installed the flowmaster Y and loved it lol, but now on the 08 im thinking of removing the rear cats and muffler and running more pipe out for duals, my question is will i lose enough performance or MPG to notice?
Nope, The pipe after the muffler has no effect on the low end performance.
I am running a true duel system made out of a 07 exhaust with X-Pipe duel 14" Magnaflow knockoff's and 2 stock 07 tailpipes.
 

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Discussion Starter #7
yeah would be funny to put SS on the side of the truck lol, hey another question what is the size of the stock pipe after the muffler?
 

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Discussion Starter #11 (Edited)
i was thinking of putting a magnaflow X pipe in front of the stock muffer, cutting the muffler off and putting a couple muffers with another tailpipe, this sounds like what you did but with 07 piping right? ok my question is what size X pipe should i get for the inlets and outlets? the 2 1/4 or 2 1/2 or 3inch?
 

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i was thinking of putting a magnaflow X pipe in front of the stock muffer, cutting the muffler off and putting a couple muffers with another tailpipe, this sounds like what you did but with 07 piping right? ok my question is what size X pipe should i get for the inlets and outlets? the 2 1/4 or 2 1/2 or 3inch?

2 1/4" X-Pipe will work on the stock pipes.
 
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