Anyone out there have a RD Sport quad exhaust for their 550?

It's seems pretty pricy, plus you factor in the diffuser. Is it worth it?

Any thoughts on their cat back single exhaust?

I'm still on the search for the best exhuasy out there.

 

I like RPI however, I don't think they make a quad setup for the 550.

 

I like RPI but think it's a bit too loud for me.

I have heard RD sport has a much deeper tone and more suitable for my taste.

The reality is anything you do from the cat back is going to give the same gains, if any, regardless of what brand of exhaust you use.

Unless make changes in front of the manifold, any cat back system is mainly for sound.