Quoting Alexander Hoogerwerf
Looks realy good, but maybey it will look even better if the dark grey underside was black like the the whole car. The engine is perfect and the exhaust pipes are a good idea. I have also build a modified version of the 4896 Roaring roadsters. It has a twinturbo V8 and the exterior and interior are a little bit changed. I will post it after I come from vacation (about three weeks).
But You made this car a lot better than Lego did. So a 5/5 :D
Thanks for the comment. I thought of making it black, but I had no pieces.