Not sure of the difference in the Whipple and Radix. Both are belt driven and twin screw types.
Larger injectors come with the kit. Hell, everything I needed came with the kit. I didn't have to use any thing except solder and heat shrink instead of the crimp connectors they supplied to extend the IAT and TB ETC harness.
That should be one helluva thing to listen to....will be nice when we make the trip down to SanAntone..
BOSS