OK thanks Guy's Yea that's lame,I don't get the nhra sometimes,that is the index for super street YET they require a engine diaper BUT don't require it in super pro and those go faster--Making NO sense--Steve
NHRA operated tracks require a diaper on any car going 9.99/ 135 or faster so most of the super street cars will easily run more than 135 so the diaper is required.