Is there that much of a difference between the two, performance/ function wise? I know there is quite a big difference in price. I am planning on getting a tuner soon, predator/ ppe and want to do this mod before that. I am eventually planning on getting a SC III.

Opinions please

I did not see any difference.

Thanks Mike, I had a local shop pushing the BD unit. I really didn't want to pay $800 for a valve body, I would rather save the money for a SCIII