Hybrid Racing K-Series Throttle Body Adapter 2017-2018-Honda-Civic-Si and a primary oxygen sensor

and a primary oxygen sensor relay

after a few months of designing and prototyping

This increases the intake air temperature while decreasing the motor's performance

Info from Aerogenics website below

Hybrid Racing K-Series Throttle Body Adapter 2017-2018-Honda-Civic-Si and a primary oxygen sensorThe RBC manifold provides a significant performance improvement over the stock PRB and PRC (K20A2 Type S and K20A Type R) intake manifolds. To complete the intake manifold conversion, you need to couple the throttle body to the manifold an adapter directly bolts a 2002 2006 RSX S ITR or 2002 2005 Civic Si CTR throttle body to an Accord Euro R, 2006 2008 Civic Si, or 2004 2005 TSX intake manifold. The adapter kit includes all mounting hardware required