I ride in a 1990 300zx that came equipped without an airbag from the factory. I'm about 5'10"-5'11" (190 lbs.) and have a Corbeau FX1 Pro installed on my drivers seat. Without a helmet it is great but if I'm at a track and need to wear one the T-Tops MUST come off. Otherwise my helmet hits the tops.... If your 6'6" I would look at some Bride Low Max's (Or other low profile seats) and deiced from there. A lot of people sell "knock off" Brides and its up to you if you want to trade looks FOR safety, performance and comfort. (remember your spine can usually only bend once in the wrong direction.... unless your double jointed)