Dynomax ultraflow siso @4 " ss pipe. Straight flow thru design,The most underrated catback on the aftermarket.Sounds great under accel. but settles down nicely when the gears go thru to 4th.Definite power gain and it is really throaty upon a heavy foot at all speeds. Magnaflow, Borla , flowmaster etc, eat your heart out, have I missed any?Only my 2 cents worth, not intended to offend the others...

 

Magnaflow has a straight through design that gives you a nice throaty V8 sound. The best part in my opinion is, it doesn’t drone at any speed.

 

I just installed the Borla cat-back dual rear exit today and so far I am pleased. The muffler is straight through and the quality of the system is top-notch. I too noticed that the crossover pipe doesn't seem as low as some of the pictures others have posted. I wonder if they updated their exhaust because it is now tucked pretty well. Not to loud and no drone whatsoever.

Corey