Has anyone tried the White Brothers E2 exhaust yet? What are your impressions? Is it quiet? Does it retain healthy power characteristics? I was thinking about combining a White Brothers E2 exhaust with a FMF powerbomb header. I figure the powerbomb header will shave even more off the sound level while at the same time scavaging additional lowend power. Has anybody considered or tried the combination of the E2 exhaust with the powerbomb header????