Mine is a one piece cover thats a direct swap as I said above. The part # is 1120900501. I got it from Crown Mercedes over the phone. Call Joe Wood he was great to deal with. The cost was $254.40 complete FedEx'd to my door. If I didn't like it he even said I could send it back. The phone is 614-799-4670 and it even came with new factory air filters (I replaced mine with the K & N's). I love mine and the reactions when I open the hood at car gatherings is great.