I recently purchased a 2004 kfx 700,it already has a k/n air filter and clutch spring,im getting ready to order a exhaust and maybe do the custom air box thing,so my questions are whats the best exhaust(single or dual) because of the crossover issue,and on the airbox will running another snorkel be safer than drilling into the lid,any suggestions will be appreciated.I LOVE THIS DAM THING LOL