Quote:
Originally Posted by jamal
I was under the impression the fronts were 42.8mm and the rears 40.4.
The non-us 277mm fronts should still have 42.8mm pistons, that's the size in literally every subaru 2-pot caliper. However, there are more than one caliper manufacturer and the front of the piston and dust boot setup varies.
The smaller rear brakes probably have 38.1mm pistons.
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Interesting. They look exactly the same but I don't know how easily I can tell 2.4mm. I would think I can tell the difference. Toyota and Subaru also gives the same part number for the pistons so I hope they are the same size.
Any confirmation that the 277mm front calipers have same piston size as the US calipers? If anything I'm 90% sure the 146.40041 is for the fronts if different size. I took a measurement of the front and rear pistons with a tape measurer and it was the same diameter. It was around 40mm or so give or take.