For Sale Brembo GP4RX 100mm new in box

Jul 2015
Oslo, Norway
What is the difference between these and the original ones? Aren't these heavier?

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Oct 2019
Yeah, but is there no performance gain?

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Stop embarrassing yourself lol. These calipers are very stiff and offer incredible consistency under race use. Different size pistons compared to m50 or m4 and being machined from billet aluminum and nickel plated there is much more precision in the manufacturing process. The calipers are 500grams each without pads so negligible weight difference.