Your charger is capable of running speeds around 150-170mph with your speed limiter shut off. Don't expect to run over the 135mph limit without the required safety equipment as noted on the home page. They will not let you run over that. If you do,without the proper tech sticker, they will make you park it. Trust me, been there and done that. So prepare your car for safety, then modify for more speed within your safety limitations. Your biggest obstacle is a rollbar, required over 135mph. Believe me, you are going to want to go faster than that

Mike