I recently bought this supposed S5 TII j-spec. In the process of swapping my engine I realize that the water pump from my car (also a S5 TII) doesnt fit the j-spec block. What exactly do I have? http://oregonstate.edu/~barraz/Ira/
I noticed a few differences between the two blocks that I can point out if needed. Thanks

 

Looks like an S4 block to me, im not sure though. But the OMP output looks the same

 

Yup, s4 Block Is what you have. The MOP Is a s4 aswell.

 

no knock sensor holes in the rotor housings, means its s4