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if anyone has their car near could you take a look at the AP racing part number on the front brake master cylinder body please.
im nowhere near mine and wanted to get a replacement ordered up.

from memory its CP2623-93 (orange) and the rear is CP2623-92 (green) but i dont remember rod length. apparently from the AP website there should be a pushrod length and its this i need to get it ordered.

analogmike

get the smaller bore if possible...

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Have you any more details on this. I can see potential benefits for sure. How does the car do with the same sized front and rear masters? Easily adjusted for via balance bar?

analogmike

Not sure of the details but I think stock there are 2 sizes. Move the smaller one over to the other side and you put an even smaller one back on that side. This gives much better brake feel and is PCA legal too:

U. GTC4 cars may change the brake master cylinders.

Contact a good shop and they should know which sizes to use.