Hybrid Racing ZDX Throttle Body Adapter - HYB-TBA-01-022 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