posted
You don't want to interfere with the air flow at the front of the car, so I'd avoid any aftermarket front fascia extensions that block the center bottom of the car.
I'd suggest SLP's center mounted exhaust & rear fascia extension. If you want to see what it looks like, we have it on our '98 Camaro. You are welcome to come over and see it.
Another thought is the OEM Y3F "appearance package" that was available on Z28's and 6 cyl cars. You can buy it through GM/Chevrolet and it was designed to fit properly on the car (although you won't be needing the rear spoiler pieces because you already have the SS spoiler).