2.5" or 2.25"? Mandrel bent pipe aftermarket hi-flo cat and a Walker quiet flow 3 muffler. I was reading on Dynomaxes site they recomend for the 3.0 size and HP 2.25" or 2.5" but note the smaller pipe is better for mid/low and larger is better for hi-rev Hp. I rarely get over 4500. cruise at 2,500-3,500... so I'm debating doing 2.55" mandrel from the Header flange back. What's your guys take on that?

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