Pretty clear. Let me tell you what is confusing as written..

1. Are you are saying that the only difference with the LeMans kit is that the rear flares wrap underneath a non-diffuser bumper? B/C the write up seems to imply that the LeMans kit has a different FRONT as well as rear flare when you say "LeMans Special Edition Style Front and Rear Flares"

2. Is it correct to say that if you have an 'is model (obviously with rear diffuser) you CANNOT use the LeMans kit?

3. There seem to be 2 options for people with 3.0/4.4 models that do not have the rear diffuser of the 'is models. Those options are the 4.8 style flares OR the LeMans flares. What you should point out is that if you do not have the diffuser, the 4.8 style flares will look stupid (I am correct) and you should install the LeMans flares unless you plan on eventually installing the diffuser which in that case you need to install the 4.8 style flares because the LeMans flares will be incompatible (assuming #2 above is correct as written). Are these true statements?