Rear Hub centric rotor
 

As my rotor will prob need replacing at the back so i thought why not get the centric rear rotor with 325mm disc, this should reduce the over heat when my front give out on the track, anyone got experience? as i m starting to make the bracket for the rear to incooperate the rear calipers.

If your front brakes are "giving out on the track", why not concentrate on fixing them instead of changing your rear brakes, which are presumably working just fine?

do you know that the offset of the 325mm rear rotor will fit. i would think it will increase rear brake bias since larger rotor means longer torque arm. front brakes shouldn't be giving out if you're using the correct track pads. the only thing that you can really improve on is durability, longer lasting pads and rotors.

RacingBrakes are working on rear BBK that will used vented rotors and OE rear caliper that and will retain the e-brake. the brake will be new, not using bridge bracket adapter.