Anybody find Drilled/Slotted Rotors for GT PP 390mm Brembo's Thank You

[Optimum Performance]

Is the benefit of upgrading from the one piece GT rotors simply going to be in the weight savings? Running the G-Loc R16/R12 on track simply for HPDE, not competition, is there any other reason to upgrade? I’m just wondering since a full set of OE one piece rotors is $500, it’s significantly cheaper to replace even when compared to just the Girodisc ring replacement. I went through 3 sets of G-Loc pads before the rotors had enough checking to make me decide to replace the rotors. Would the Girodisc last longer?

Over the stock iron rotors that savings will be substantial. These should come in under or around 30 pounds, the GT rotor is around 34-35 pounds. They typically will run cooler, due to the curved vane design, and more vanes than a typical OE rotor. Than translates into longer pad life. Is this truly measurable outside of a brake dyno....or a fully instrumented car, probably not. A floating rotor also has room to expand and move so they tend to run true. The metallurgy that Girodisc casts their rotor rings with also tends to work better with racing compounds than the import replacement rotors. The OEM Ford rotors typically react well to the racing compounds.

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