There is a kit out theere that will let you do this. What happens is you rev the engine up and hit a switch which cuts the spark to the sparkplugs to allow raw fuel to get in the exhaust, then when you let go of the switch everything goes to normal. From there it hits the spark plug at the end of the tail pipe and ignites. This is only a momentary flame and nothing constant unless you run the engine really rich as stated above. This s not good do do on any car with any kind of cat converters. All the raw fuel sitting in them is not good at all!!!! And once again, this is not safe at all, even for show off the street.
