title says it all but im not sure im racing it on a track and all the nitro guys say to get it but do they even make a erbe one lmk

I have one, here's my take on it.

1. for bashing and jumping or speed runs you don't need one. You can notice the difference right off the line.

2. For racing, I would highly recommend it as it helps. The CD puts more power towards the front for better traction.