I have ZERO experience with the Outlander brake setup BUT...From my personal experience with brake upgrades I would suggest going with a larger brake Booster & Master cylinder since the outlander caliper cylinders are no doubt larger then any OEM DSM, there was a much needed and noticeable difference when I upgraded my booster and master with my 02 cobra brake setup.

I would imagine the master wouldn't be up to the task with any calipers that are larger then the OEM 2 pots, It will probably work fine but you won't get the full effect of your newly found braking capacity unless you give the calipers the force they were designed to work with.

The upgraded Master and Booster I speak of can easily be found in a few different cars such as 3g Eclipse, 2g Sebring Coupe and the evo 8. you will be looking for a measurement on the side of the master that says 1 1/16'' instead of our OEM 1'

Good luck and happy breaking