After some help (here), finally got the Adaptec spacers installed. The spacer sizes are 10mm Front and 15mm Rear.
Pictures are a little deceiving but the rear tires are about 1/2 inch in from the farthest point of the render and the fronts are 1/4 inch from the fender. No issues with rubbing, dirt, etc I'm very happy with how they turned out and glad I did not get smaller sizes.

 

Nice looking. Chaos236, are you paying attention?

 

Wont this cause dirt to be flung all over the car? I had a Jeep that the tires stuck out passed the wheel wells and was a B"""" to keep clean. Just asking....

 

Alan -- big thank you for your advice - made the process much easier. The Targa looks so much better with the wider stance.

The last picture of the rear tire may appear its sticking out of the fender excessively but its not at all - its just the angle of the picture. You can see from the first and second pics the rear tires looks flush with the fender but its actually 1/2 inch inward from the farthest point on the rear fender.

I've taken the car to the coast (about 150 mile to/from) and no issues with dirt and road debris being flung(no more than normal that I've experienced). No vibration issues, etc. In fact, the car felt more stable higher speeds

I'm super happy I did the upgrade. I've done this for my R8 V10 and M3's without issues but wasn't sure about the C4S.
Again, big thanks to Adaptec guys and Alan.




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Thanks for your patience, it was a pain to get that problem fixed.

It looks great, I like the 10 fronts better than the 7s. It's a small bump out but the handling difference is crazy, right?

Glad you're enjoying them.

- Larry the computer guy.

 

Hey Mark, can you email me some good pictures of the final product for our social media? I'd be stoked. Thanks, Larry - motorsportlarry@gmail.com