In just did this mod last night. Unbelievable. Car warms up very quickly and stays at full temperature. Before, it would always creep down when at a long light or coasting downhill (its very cold here in Anchorage Alaska. I'm originally from Calgary, and I'm convinced the two should have a coldness competition.)
The car definitely has more power when its warm, and I'm sure MPG's will be up. The foam in the grills is barely noticable. I also popped off the VW emblem and covered the back to stop air from getting in.
Thanks for the awesome mod.
Cam