Hi! Welcome to the forum!
May I assume you have a V6, RS version? RS is a package you put on the car, not exactly a model. The SS model comes with the mailslot you are referring to and they also can have the RS trim package.
Now, to answer your question, yes, you can. You will find quite a few threads on the forum of people putting the SS front fascia on the V6's
I have seen people want to go the other way when they have hood scoops on their SS models!
Enjoy your car!
post some more info: model, color, ...and then pictures!
Thanks,
Michael J.
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2010 Black 2SS/RS; 6M; IOM, GFX, sunroof; ADM Race CAI; Zoomers CB; Viper Alarm; Pdaft F&R sways, Adj Endlinks, Rtrailing arms, Camber kit, strut brace, Front Trailing Arm Bushing; SLP Skip-Shift Elim; Tinted lights/windows; Hurst Short-throw; LoJack; Door & Dash ABL Mods; ********; JBA Shorty headers; AACStyle LEDs; Stillen DS rotors, Hawk Ceramic pads; Havoc Blk Chrome wheels: 20x9s; Lingenfelter Blk Al Pedals; RevXtreme Catch Can; Goodridge SS lines; Ported TB; RK Sport hood; Hotchkis chassis brace; KW V3 coilovers;