Planning on buying a OTT stg.3 kit in the next month or so and want to get some supporting mods first (option B, rotated mounts, 3" intake etc.) Can I run an LS4 throttle body and OTT 3" intake on a GM stg.2 tune with no problems, codes, etc? Where can I buy an LS4 TB?

 

You need to tune your scaler. It wont work properly on GM2. You yeild better results with the 3" intake and you need to port the blower inlet. You can get a spacer and not port the blower but it seems worthless due to the inlet size of the blower.

 

Running the ls4 throttle body on the gm stage 2 tune is a BAD idea.

 

That is what I had thought! It is fine to run a 3" intake on stock TB and M62 with GM stg.2 correct ? I will just go with the LS4 when I do the OTT stg.3