I got the Trinity Drake pipe for this engine because it is the only one I can find with the proper header and I must say I am incredibly impressed with this combo. Even with the 7mm restrictor it is fast and smooth everywhere and in the last race (admittedly being somewhat conservative with the throttle) I stopped at 7.5 minutes to go and still had 1cm fuel left in the tank. I was able to clear a jump that only a few could and ended up finishing very well.