What would be the best performance parts to start with on my stock 1999 xp seadoo?

I'm looking for some performance parts for my stock seadoo xp 1999 951. Are there performance chips just plug and go type stuff. What would you guys suggest me to start with?|||Leave the engine alone. The best way to improve performance on any Doo is to improve the ride. Start with a ride plate ($175) and a performance impeller kit ($400-500). If you are still not satisfied, you can start doing some component changes, but keep in mind that you should do intake, exhaust and ignition at the same time for the best results. Start saving your dough.|||Great ski. In order of cost and effectiveness: Lose weight, premium gas with racing oil mix, new spark plugs, torque the head, make sure you don't have any mainfold leaks, high flow intake grate, high flow carb filter, ride plate, variable pitch stainless steel impeller depending if you want low end power or top end speed, mill the head, drill out the needle and seat, high flow tunable exhaust pipe, stainless ring in impeller area, extrude hone or get some wet sandpaper and smooth out the rough castings in the intake and exhaust manifolds, aftermarket exhaust, then intake mainfolds and carb(s), drill out your pistons to one over, lightened flywheel, lightened drive shaft, refiberglassed bottom. You've got a really mean machine. Be safe and know your boating laws.|||replace the grey tempo fuel lines. They will crack and clog and cause your engine to run lean and blow up. In 2001-2002 they replaced them with better ones. You just need to buy new ones and you will be set. in terms of performace ride plate and propeller. Engine work last. These engines are milked pretty good from factory but you can still make power.