- Mon Jan 04, 2021 8:49 am
#47157
I figured it would be useful for others to know the specific brake rotor sizes. This would be useful if you're looking for non OEM parts (like two piece rotors) or figuring out the upgraded sizes for front and rear.
Porsche makes a lot of different brakes sizes, without a lot of part number cross overs. However, they will often make a rotor in the same size, but one is solid and the other is cross drilled. They won't show the part numbers as fitting other vehicles, but they do. So, if you have a GTS (or have upgraded to big red/black front calipers), you can not only fit the solid GTS front rotors, but you can also fit the cross drilled 964 turbo front rotors.
The hat heights are my calculation to the nearest 5mm since that's what you'll find for most two piece rotor hats. However, if you're having them custom made, you may want to get them made to the nearest mm.
Porsche makes a lot of different brakes sizes, without a lot of part number cross overs. However, they will often make a rotor in the same size, but one is solid and the other is cross drilled. They won't show the part numbers as fitting other vehicles, but they do. So, if you have a GTS (or have upgraded to big red/black front calipers), you can not only fit the solid GTS front rotors, but you can also fit the cross drilled 964 turbo front rotors.
The hat heights are my calculation to the nearest 5mm since that's what you'll find for most two piece rotor hats. However, if you're having them custom made, you may want to get them made to the nearest mm.
Vehicle: 1987 Porsche 928 S4