According to my info, the 993TT had a 25.4mm M/C with a stroke of 17mm for the front circuit and 15mm for the rear. Thats ALOT of volume of fluid to move with those calipers. The M/C for the 996TT should be about as big I'd assume.
You can use this info to compare with the Bus M/C.
I'm running 993TT fronts and 944T fronts on the rear for calipers, and am using dual Wilwood M/C's on a custom mount with stock pedals with balance bar and remote bias adjuster. 25.4mm M/C for the front circuit and 22.22mm M/C for the rear.
Hope this helps.
Sandeep
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