As I'm in the process of fitting 1/2 of my Sportspack Arches (the rear 2), I'm curious as to whether or not they should be trimmed or not. This is probably going to sound confusing, but I'm referring to the fibreglass inside the wheel well, ie the part of the arch that mud would flick directly onto. Do people cut that all out?
Does anyone have any good close ups of inside their wheel wells with Sportspack's fitted (the fiberglass type).

you dont need to trim it unless you have trimmed your existing arches on the car and want to lower it significantly

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1962 850,Frog