i have long tubes on my car already installed..im going to be running 2.5 inch dual exhaust and have it exit right before the rear tires..just wondering what everyone preferences with these 2 mufflers are..which one's are louder, flow better etc. i already know this thing is going to be LOUD..

I have heard both and like both, I think the spiral flows are quieter than the bullets. Not sure which flow better though.