Hybrid Racing ZDX Throttle Body Adapter2 10 HP Increase OEM Reliability (when combined with the TB) Installs in less than 30 minutes Complete Kit The Hybrid Racing ZDX throttle body adapter allows you to bolt a throttle body from an Acura ZDX engine onto your 2006 15 Civic Si. The ZDX throttle body has a larger bore than your stock throttle body allowing your engine to make more power. Expect to pick up between 2 10hp depending on the other modifications you have installed. We recommend