turbine housing A/r ratio. Was at my friends place(scraps/parts lots of 80s cars) and im like hey, whats this. He says the wastegate, I say thats no wastegate buddy the wastegate right here. It was a flap that opens or blocked about half the flow to the turbine housing, and the housing entry was divided. I think this set up is also used on a lot of turbo desiel trucks, and larger turbo work duty applications. Any ways, i thought it was neat seeing it on a 2nd gen RX