Some help guys. I recently purchased a 1999 F355F1 and traded my 01 M3 conv. for it. My question is how the high speed stability is in these cars. My M3 felt much more solid at 80 and above. I could drive the M3 at 140 all day long but the 355 is fatiguing at that speed. Actually the M3 handled much more smoothly and conifidently overall. Much easier to drive at the limit. The 355s limits are much higher though. It does have aftermarket rims and tires. Michelin pilot sports. Any ideas? PS I am not complaining, the 355 is a phenominal car. Glorious sound and looks. A true dream car. Check it out. Thanks guys.