Hey guys... I picked up one of these for my Pro4 a while ago (see attachment - on the motor mount) it helps with the cooling of the motor but its main purpose is to allow you to take of/put on pinions without removing the motor. The other side of it has swirly cooling vents to aid the motor cooling (its on the wrong way in the pic lol
) Good luck finding one if you want one, I got mine from a local guy at my local track, I havent found one online.
Made by speed mind - Precicion machined motor heatsink spacer, purple (CP-01P)
oh yea, the pic does the titainium BMI chassis no favours