The covers were only $69, and the brace $139. I'm pretty sure the brace is going to work with the 2.9 since the stock Boss STB works, and the clearance is about the same. I'll be sure to update when the Whipple arrives.
Even though the BMR is narrower, they feel about the same weight due to material, thickness.
lMO, these parts would also look badass with any black blower as well.