I just ran my Rampage and what a dog! I removed one stage of the stock filter and it got better. I gutted the can and it got a little better. Weird thing is on the run in to the hill I would pick up speed (in the snow) and when it got on the incline of the hill it would just rip the hill (all gravel) to shreds right to the top and roost a turn then lose power down the hill. Weird or not??? Well my real question is: will I need a torque wrench or any special tools for installing the 28.5cc GPM290 head kit and will it improve the low-end power noticeably or substantially?