Would a lowering kit reduce the drag coefficient and also allow less air under the car for less wheel slippage? And how much do tires effect the top speed? I mean good ones like racing slicks or perellis. I think a good chip tuning and racing tires are all we need to do the 180's. And how does our cornering compare to the competition. Another member is working on a v8 conversion and it bolts right to everything. i just dont know if the trans and everything else back to the rear wheels can take it. I'd like to try to get up to 350 HP with only an engine swap with a w210 e430