go to macsboot.com for your upgrade, simple chip to add to ski, takes a few min and no tools. You want performance than HOLD ON. This is the best and only way to go! you could add the inner cooler but thats big $$ but if you got the money and don't want the RXP's passing you buy this is the ticket. And you can remove it without a trace so it won't void warrenty. Have fun RIDE HARD WOT!