Do you run with the front arch liners removed?

[trygve]

I don't plan to remove them. The front side shields the radiators (unless you leave the fans and shrouds in place, which presumably you aren't; and so removing the liner will radically alter the radiator air flow exit by dumping the air on the leading face of the tire). The rear side on the right protects the fuel filler tube and fuel emissions canister. The rear side on the left protects the washer fluid bottle if you still have it.