I performed a few upgrades recently on my gt3. Added steering wheel controls, painted seat backs, and carbon door sills, red seat belts, and rs shifter in red alcantara.

The steering wheel controls requires coding the gateway and steering column module. The durametric system cannot do both. Must use a factory PIWIS system.

I took the seats completely apart and painted the seat backs. I also added the factory yellow stickers back on the seats.

Lastly, added the carbon door sills. The original sills are a royal pain to remove. Recommend using a heat gun to soften the tape. Wiring has to go to the door itself so it requires removal of the panel.

Feel free to ask any questions regarding any of the above in case anyone needs help with these mods.

 

sorry for the sideways pics.