Hi everyone, earlier this month I posted about my blown front rotor, housing and iron. After listening to your advice I bought off these parts for my S5 Turbo II. Now that I received them though...I'm having some doubts. The seller guaranteed me that these parts came out of a 1991 Turbo II block.

I can't help but notice that the rotor housing has a diffuser in the exhaust sleeve, but I've heard that these only come in the N/A engines. Also, the recess on the rotor seems to be cast instead of machined like the S5 rotor (I posted a picture comparing it with my good rear rotor).

Am I being paranoid? I could really use some help in making sure everything is right before I start rebuilding. Thanks a lot!

Pics: imgur: the simple image sharer