I wish I could have fit that conical header on my Schumacher. Unfortunately the engine is way too far over to the side to fit it in the body. I really liked it on my 710. We never got on the track together to compare, but I think Pit-Racer's PS12 was a tad bit stronger than mine. I think it was the header combined with the TP06 muffler (he had RB's version) making the difference.