Removing the SAS may not give any increase in horsepower but I found it made a big difference in eliminating poppin' and bangin' on deceleration as well as improving idle. 48mm front end upgrade gives a fair bit more planted front end feel. The 43's are fine but are a bit flexy and vague compared to the 48's. Its pretty simple to do on the SXC's too as you only need to change the bottom triple clamp (top one is the same) and get an axle reduction kit to run the 20mm axle in the 26mm fork clamps. More and more EXC's getting parted out so anything from 2003 to 2015 will fit.