The STM FIAV (Fast Idle Air Valve) block off plate is cut from 1/8" aluminum and designed to be used if you have removed the bottom portion of your throttle body are no longer using the factory ISC motor
Please measure and see measurements for your application
2017-2020 Honda Civic SI FC1
• FM12 Evo step height is 32mm
Part Number: Replaces: Diagram: MN183895 - 03039
Radium Universal Check Valve 6AN ORB to 10mm Barb (20-1534) Gram Lights The STM FIAV (Fast IdleRadium universal check valve with 6AN ORB to 10mm barb. The flow direction is laser etched on the side of the hex. A one way check valve permits flow in one direction only. Radium Engineering check valves feature a lightweight anodized aluminum body with FKM seals and stainless steel hardware. Compatible in multiple applications including gasoline, ethanol, methanol, diesel, water, coolant, oil, etc. For internal valve purposes, the length under the