The AVANT FGS front fender extension adds 5.75" of length, is wider than the tire to catch the most splashback, but does not look wide because of its flared side wings. It bolts on in 5 minutes - NO MESSY DRILLING REQUIRED! And, it can be removed easily for maintenance or transference to another bike.
AVANT fits 2007~2018 F800GS, 2007~2012 F650GS twins, 2014~2018 F800GS/ADV. AVANT does not fit the F700GS.