The ski runs great had it for two years now but getting bored of the power. The only mods I have our Ski Clinic bob adjustable footholds, carbon fiber engine reinforcement and duel air filters. Everything else is stock for all that I know. I need more power but my number one concern is reliability. I am thinking about getting the factory b-pipe but do not know if there is a difference in power versus the price of the regular factory b-pipe or the one sold by wamiltons that he ports and polishes? Will I get the best bang for my buck with the factory b pipe if so which one and also is it required to have a girdled head? Also is there any other upgrades that will give great freestyle power. The skis mostly used for freestyle jumping wakes. Any info on getting more power and keeping the reliability at a justifiable price would be greatly appreciated thank you