adding splitter would be a good or bad idea ?

 

i would say adding something in the grills and the rear bumper so you don't see the support would be a better idea..

 

And I came in here looking to see parts that would actually generate downforce. Instead, we just find cosmetic pieces...

About the only benefit I can see is that the rear bumper will have less of a "parachute" affect with those "speed holes" in it, which could be a small benefit to mileage.

 

Wow! look...subliminal advertising without the desired effect. Please contact site admin to become a paying sponsor here on H-T