My fiberglass hood blew off my 94 Mustang and it was only running 11.6 @115mph at the time. Honestly I wouldn't race a car that runs faster than a 12 without them. As soon as I let off the gas after the traps it came up, all I seen was silver and it ripped off the hinges and I watched it fly 30 ft in the air thru the rear view mirror. It ruined my hood, cracked the cowl, smashed the windshield, dented the roof and one pair of underwear had to be tossed. Scared the hell out of me. I didn't like the looks of them and paid the price. I ended up repainting the car.