Originally Posted by BGTV8

You need a proper wing to provide down-force .. the OEM stuff is simply cosmetic and marketing-driven bull-tish

Could give serious bling-factor though.

If you install a wing, then a splitter is also required because the last thing you want is the equivalent of a 100 or 150kg bag of sand in the boot/trunk which will only serve to lift the front and let more air underneath it.

Usually is splitter at the front then when.

Remember, if the splitter is generating 80-100kgs of downforce, you getting have it securely mounted - my race car splitter/airdam is mounted to the chassis with 6 x 8mm bolts for precisely this reason. Where the bolts go thru the fibreglass it is reinforced with some ali plate as well - it needs to be "robust".