Definitely take them off, gives the car a "less plastic" look. Way cleaner lines as well

1999 SVT TRed/Tan: B-Day 1/28/99 #1034/2760 Sony ABP HU, Kenwood 800w Amp, XPLOD ES 800w Amp, Lightning Audio 1 Frd. Cap w/ Dig Readout, 2 12" JL W3's, Pioneer 6x8, K&N RU-3530, Superchip, SVT Sill Plates, Grill Mod, Ding guard-less, B&M Short throw