Im trying to decde between these 2. I want the most power. I ordered the AMS test pipe since its straight. Ive read the AMS downpipe makes the most power would this be a better choice over a ETS open dump? Also which exhaust would be best? Single ETS or AMS?

 

not big on the way ams single sounds. ets open dump is very loud and sounds funny at idle.

 

ets is the way I went. I have a dual exit though. As far as the downpipe all I can say is the ets open dump is loud as heck. Eventually it'll get to you imo, that's why I went with the recirc and my set up is still loud.