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I need some opinions on bumping up the pipe size on my exhaust.

I can get the Magnaflow 2.5" muffler and tip for around $130 shipped and do the install at work. Question is, would it be worth it to bump up the pipe size from the flange back to 3"? It's about $20 more to get the 3" muffler and tip, once again install and piping at work. Any performance gains/drawbacks? I want it a little more free-flowing, but don't want to loose much torque.

Has anyone noticed any MPG changes with a muffler swap? (besides having your foot to the floor all the time):)

Thanks for any input.
 

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Unless you did a 3" tailpipe as well, I can't imagine that it would make any difference. Going 3" from the flange to tailpipe would probably drop some low end torque.
 

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I would just stick with 2.5 inch exhaust.
 

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A mandrel bent 2.5" is probably you best bet to gain efficiency without losing too much velocity(TQ). You can order a U-bend and a J bend and a straight section and make your own high flow 2.5"....prob about 150.00 worth of materials if you can cut and weld yourself.
 
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