I recently installed the motordyne y-pipe w/straight pipe attachment.
I currently had tanabe catback,m370 manifold and hps tubes with afe dry flow filters...with the ypipe added on last,I definitely notice a sound difference. car now sounds like a pissed off g35,quite the exotic tone.I do not have a dyno chart unfortunatley,but I'm sure it made some gains,as the stock ypipe is just so wimpy looking and restrictive. but as for sound,the motordyne pipe is shapped differently from other ypipes,so I believe this is why the sound changed more than I expected
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