OK I take it back not too happy with these.
I only reved it a little bit in the garage yesterday when I posted. Tonight I took it out for a drive now that the roads are somewhat clear of snow. Butt dyno doesn't feel much different and it's got SEVERE bees in the can sound when driving around.
Go WOT and above 4000 RPM it's great. At cruise and partial throttle it sounds like crap with all the buzzing. Maybe after a little more driving the sound will change but for now Im kinda pissed. I can re-use the header wrap from my old y pipe but I don't want these to rot out faster.