the KR will begin 2 leak over time
most of my friends that have a kr header either got rid of it or got it welded 2gether cuz it started leaking
I don't have the exact kr header but I have an SSR copy from a shop that RULO on the board recommended. I just figured that it was about the same.
Either way, I have had the header for about 2 years and it seems to work fine but I would upgrade if there was more power to be had with a custom header.
On a side note, how do I know if my header is leaking...