^ its a requirement for vehicles that reach a certain time and speed. same as a roll cage. once they reach that point without it they would not be aloud to run without it. its the rules.
Actually, most FWDs with wheelie bars use them to lightly lift the rear wheels so a lot more pressure is sitting on the front wheels.
But my car will NEVER be that fast so I don't have to worry about any of that stuff! lol.
By NHRA and IHRA im not aware of any "rules" that your car at any speed should have a wheelie bar. The only rules im aware of is for roll cages and parachutes. But as far as wheelie bars IMO its more of a preference. Going to Memphis I see cars that are running mid 7's at 170-180mph and they dont have a wheelie bar. But my car will NEVER be that fast so I don't have to worry about any of that stuff! lol.