When I was at the track in my V6 last friday night, a guy in another 3.7 v6 with huge 19 or 20 inch chrome wheels was in line just a few cars in front of me. I heard them say his time was 14.6. My take, for what its worth, the car will not only perform its full potential, but look the way the v6 should with modest sized wheels and tires. Personally, I wouldnt go beyond max spec on width, which is 8.5. On the hieght, Ford put 19s on the performance package which I think is too tall. I drove a charcoal grey performance v6 w black mach wheels before anything else. When I walked up to the 18 mustangs they had on the lot, that car caught my eye. The wheels, from just the right angle are hideously sick on any color stang. But, the car lacked acceleration on third anf fourth gear punches vs base model. 90% of defending your cars honor is a pull up confrontation about a 30 to 40mph. Those 331 gears dont overcome the huge wheels when you punch it from cruising speed. The smaller the better in that scenario. Besides, if more V6 guys didnt try to look like they got a shelby, the V8 stang owners might show their lil bro some love. Ford should have never gave the V6 performance pck those exclusive 19 inch wheels. They are one of the most viscious looking wheels Ive seen, certainly by ford. Those wheels should be on a GT or higher. Im thinking 18 x 8 all around is max for the v6 with minimal power loss.. 18x8 in front and 18 x 8.5 in the rear if your dead set on the stagger look.. The v6 is worthy of a slight stagger to show some muscle, no doubt, but the muscle shouldnt exceed whats really under the hood. Follow that rule when customizing your v6 and you wont hear: you shoulda got the V8. I wouldnt sacrifice the heart of my car for a look. Especially if that look over states what I really got.