imstimpy

After quite a bit of hunting, I think the following is true:

Disc dimensions: 380 mm by 34 mm
Radial caliper mount: 225 mm

997.2 GT3 Street Part Numbers
- 997 351 431 94
- 997 351 432 94

997.2 GT3 Cup Part Numbers
- 997 351 431 90
- 997 351 432 90

Can anybody confirm, correct, or add to this?

At this point, I am specifically wondering if there is a meaningful difference between the street and cup calipers.

Thanks!

tcsracing1

I recall the iron 997.1 GT3 street calliper was smaller then the 997.1 Cup calliper.
However, the 997.1 PCCB calliper was the same size as the 997.1 cup calliper.

997.2 was different again.

correct me if im wrong.

imstimpy

I show the 996 GT3 and 997.1 GT3 irons to both be 350x34 with 28, 32, and 38 mm pistons. The 997 PCCB and 997.2 iron look like 380x34 with 28, 30, and 32 mm. Both 997.1 and 997.2 cup calipers appear to share the same part number and dimensions at 380x34 with 28, 30, and 32 mm pistons. For my application I am in need of the 28, 30, and 32 mm piston configuration.

Where it goes grey is what is actually different between the 997.2 GT3 street caliper and the 997 cup caliper. What does one get with the extra cash towards the cup caliper?

powdrhound

Cup caliper does not have the rubber dust seals. Other than that it's the same.