Came across this vid today from the OZHoon people. Pretty impressive numbers. Chart stops at 8200rpm. No less than 1000ft-lbs between 6600 and 8200. Look at minute 2:16 for half a screenshot of the numbers. Looks like they need to install some sort of studs on the side of the exhaust ports if possible. Seems like the flames are shooting out sideways. Assume lack of clamping strength. Enjoy.