Hello there,

I am writing this on behalf of a friend of mine that owns the above model. He is currently on BSR Stage I upgrade and needs some answers about the Stage III upgrade.

To be more specific, he wants to know whether there's loss or gain with the exhaust in the low rpm and whether the consumption changes.

Hope some people in here already know the answers, and I apologize if I posted this in the wrong section, so admins, please be merciful