Trask, Assault series derby cover. Gloss black

With a clear Lexan polycarbonate window to offer a direct look into the go-fast internals that you've installed, or going to install. Used with the 'narrow profile' outer primary covers as stock on all 16-up Touring and Trikes. Also fits 07-15 Touring, Trikes that are custom equipped with the OEM 25700385 or 25700438 'narrow profile' outer primary cover. Note: These derby covers are a bit larger in diameter than the regular derby cover of earlier models and will therefore not fit regular outer primary covers of 07-15 models. - See-through no-leak LEXAN window design - Compliments the Trask Assault series air cleaners and cam covers - Fits models with approx. 4" (10.2cm) bolt spacing / Fitment: 16-24 Touring, Trike; 2015 (NU) FLHTCUL, FLHTK; 07-15 (NU) Touring, Trikes with narrow profile primary cover