This one is different from mine. Joe offers 2 options for 996 GT3's. Mine bolts on to the factory mounting spots with factory hardware and 3M tape. It's not going anywhere.

 

It looked different in the pictures. I might need a little more wing in the back to balance out the front. This splitter felt very effective at Road Atlanta last weekend. Might go cup wing instead of RS wing that I run now.

 

Mine works perfectly with the RS wing, I could see how you would need more wing as yours is definitely more aggressive. I saw a car with yours at Road America and that's how I initially learned about Joe and his splitters.