My buddies quad, we pulled the airbox and put pods on, @ 500ft above sea level , cold out right now 30-50 just depends on the day.......we put 240's in it first and he thought it was fallin off on top. The next step up that I had on hand were 270's, put them in and he says it's a little better but still not the top end he was hoping for. Personally I think it's as good as it's gonna get with stock pipes, I was thinkin we should drop back to the 240's and maybe raise the needle (it's at stock setting now). What do you guys think?