I've had mine installed now for about 1500 miles. This is my second header. The first header wasn't decked correctly on the flange, so it didn't seat correctly and caused an exhaust leak. My vendor swapped me another one and I was good to go. Overall impressions, for $350, I believe it was truly worth it. I'm etuned with @
moto-mike, stage 2, 93 Oct. it definitely "feels" faster. I have yet to dyno it, so no actual results. Maybe one of these days I'll swing up to Moto-east for a few pulls.
Other than that, I have it paired with a PLM overpipe, Berk Catted Front Pipe and an N1. And it's loud. Very, very loud. But I love it.