Look on here for Motohooligan or DNA mk 3 Air filter conversions
viewtopic.php?f=1&t=17178Stock SD about 109hp
SD with Akrapovic Exhaust 115hp
SD with Akrapovic + Motoholligan Airbox 122hp
SD with Akrapovic + DNA mk3 Air box 128hp
These are the figures from my bike.....some bikes give more some less
This will take a SD up and past a standard SDR hp
.........BUT.........you can do these mods to a SDR (08 and later) will give more top end ...but less low and mid range (The ealier SDR had the same motor as SD)