So 997 Turbos and GT3's share the same wheel carrier and same rotors 350x28, yet the callipers have different part numbers... looking at the PET's they both have 2x 34mm pistons and are red.... So whats the difference?

GT3 rear caliper 997.352.425.97
Turbo rear caliper 997.352.425.11

Choc fish for anyone who can tell me!

Thanks

 

Check the rotor part numbers. Although the diameters are the same I suspect the rotor hat offsets are different. They're different offsets in the front for sure.

Another guess would be NB versus WB differences.

 

You are correct the front rotor hats are different on the fronts between turbos and GT3.

However the rears both use:
Same wheel carrier part number
Same rotor part number
Same master cylinder part number

Just the calliper part numbers are different...but both callipers also are red and have the same size pistons.... so i can't think what else might be different....

Aren't both turbos and GT3's wide bodies? Maybe this is the difference...???

Ive had 2 porsche dealers confirm the above but neither can tell me what makes them different.

 

GT3 is a narrow body. GT3RS is wide body.