With just the pipe and ypipe you could probably get by without the boondocker, but you will be much more safe and able to adjust. I have a similar setup with a few more mods, plus the injector perfector and had a burn down last weekend on the lake. Not good. Luckily just the pistons, cylinders fine. Just put the y-pipe on the sled late last season and never had a chance to do any hard long runs. Well it didn't take long. I was running a 290 main. Shut down at 105 MPH. I also discovered while tearing things down that the pipe had come loose on the can which didn't help things. Anyways, just be careful. I will not be running the y-pipe with my setup. Good luck. I will include pics of the pistons.