[spookypt]

Backdraft have done alot of different aero stuff. As you can see from the pics they aren't afraid to have a crack at front splitters and spoilers, rear duck tails, rear venting, bonnet venting, guard venting... in different configurations etc

My car (Oz No:6 without hardtop) has rear duck lip, rear difuser, front splitter and spoiler, vented bonnet and boot. How much difference "I notice" it makes is hard to quantify. Certainly for a race car it looks the part LOL. I enjoy the tinkering part of making it work and look right but some may argue that I'm not succeeding in the look right department. From the feedback I get from BDR USA any larger rear duck lip gives the car way too much front lift even with the front aero aids. A hard top accentuates this also. The larger letterbox opening bonnet scoop on the bonnet increases lift so the vent holes or reversed opening makes a big difference as well.
Spookypt