The new Compound setup put the big turbo first to receive exhaust from the manifold via the last adapter. Then a section of the Mandrel bent stainless donut I used for the charge pipe was cut to make the tightest possible 90* bend off of the HX turbine outlet...much stronger than the other setup. Then another portion from the original charge pipe itself was used to make a 3"- 1.5" tapered horn. The compound system is not the traditional setup. For those unfamiliar a brief explanation. In a compound turbo setup you have 2 turbo chargers of different sizes. The Primary (High Pressure) turbo which is the smaller of the 2 is the first one to see exhaust from the engine. The exhaust gas that would normally come out and go to the exhaust system is then routed to the Secondary (Low Pressure) larger turbos turbine inlet housing. The low pressure turbo (big) force feeds the High pressure turbo (small). The High pressure turbo feeds the engine at all times. This is to reduce the turbo lag. The small turbo makes for quick spool and good streetability and when the big turbo starts making boost the small turbo multiplies whats being fed to make more power. So in this unorthodox setup the Big turbo receives exhaust first and the small turbo Second. The Big turbo still feeds the small turbo. Now the wastegate just vents back pressure from the large turbo and will dump excess pressure to the exhaust. The Small turbo is using a wastegate control valve and a billet wastegate set to 2 Bar. I will set the Hypergate to open when the max desired back pressure on the small turbo is reached.