HOW MUCH DO YOU DRIVE. Just got my 348 Challenge last Tuesday, have driven it 3 days and over 390 miles on local roads. This is a track car with race exhaust, roll bar, 315's rear, and full track suspension but with added interior and lights. I'll drive 12-15K this year. Side note, the exhaust has not been a problem, although I wear ear plugs. Also run 100 oct. gas.