They are black in color so from what I know that should be a pro kit (sportlines are red, and drag launch are blue) The front spring part number on the spring is 3510.301 The rear spring part number is 3514.402

According to summits website it says 3510-140 I am not seeing what the differance between the 301 and the 140 is. But they have another kit with the part number is 3514-140 From what I see is the 3514 is for a convertible. But I used them on my car, it looked great and they worked great. They are Eibach springs you can never go wrong with those.

I dont understand how I have 2 differant kits. I bought the kit brand new. But it is from the Ford Racing catalog. I know it sounds weird but I remember when I bought them it was a Ford Racing part number but when they arraived it was in an Eibach box. I beleive Eibach makes the springs for Ford if I am not mistaken thats why it cames like that.

Here is a link to summit:

Eibach Pro-Kit Lowering Spring Sets: EIB-3510-140 - summitracing.com

Eibach Pro-Kit Lowering Spring Sets: EIB-3514-140 - summitracing.com