I would highly suggest an aftermarkket pipe or a 2004 or older depends on how far you want to go.If going with the kit go for the rs2 from sip great pipe and price will need a carb to make it right.The rs 1 is nice with a pod will need some jets to go with that,some pipes come with and some don't.I think my first came with a #95 it's ok but #105 or more is better,the stock carb is a pain,but can be delt with.With those mods on the 2009 got my brother in law at 250lbs to 50+ almost 55 with me at 200+lbs.beware once you start 60 is around the corner!