Hi anybody know about octane boosters, if they work or which one works any real tests done or anybody tried them, also is it safe for the car

and racing gas could you just use it once or twice for fun with out harming the engine?

I don't have a Stealth, but I have a SRT-4, I have ran the prestone injector clean and octane boost and noticed a little difference, plus they also sell just the boost additive, I like them I have tried other and didnt notice a thing. As for race fuel, leaded will screw up the 02 sensors, not if you get the unleaded race fuel then you wont have a problem. The lead just coats the sensors causing them to go bad or fail. Unleaded your fine and you can get 100-118 octane I think.