Quote Originally Posted by Andy Bettencourt View Post

As to the plastic over in front of the radiator, I kept mine. It actually keeps better air into the radiator. Back in the day, the 1.6 SM guys were adding the 1.8 piece IIRC to improve cooling. It might be specifically allowed in SM.
It is allowed for the 1.6 in both SM and SSM, and makes a big difference in cooling. I've run my car back to back with and without and the differences on an 80 degree day were immediate.