Skunk2 309-05-0001 72 mm Electronic Throttle Body for 2006-11 Honda Civic Si 2.0

Vehicle Fitment

• 2006-2011 Honda Civic Si (Coupe/Sedan, 2.0L K20Z3 I4)

Features

• 72 mm bore - oversized compared to factory 64 mm throttle body
• CNC-machined billet 6061-T6 aluminum construction
• High-torque servo motor built into throttle body for strong response
• Advanced Hall-Effect throttle position sensor (TPS) integrated
• Flows approximately 50% more air than the restrictive OEM unit
• Includes precision-honed bore for smooth throttle-movement and airflow transition
• Thermal gasket and necessary hardware included for bolt-on installation
• Improves throttle response and power output for naturally aspirated or boosted applications

Specifications

• Part number: 309-05-0001
• Throttle body diameter: 72 mm
• Material: Billet 6061-T6 aluminum
• Flow improvement: ~50% over OEM 64 mm unit
• Designed for Honda 2.0 L K20Z3 I4 engine in Civic Si (06-11)
• Installation note: Factory intake tube may not fit due to larger diameter - aftermarket intake or coupler may be required

Included Components

• 1x 72 mm Electronic Throttle Body - Skunk2 part # 309-05-0001
• 1x Thermal gasket
• 1x Hardware kit (mounting bolts, coupler recommendation) for installation

Product Description

The Skunk2 309-05-0001 72 mm Electronic Throttle Body is engineered specifically for the 2006-2011 Honda Civic Si with the 2.0 L K20Z3 engine. By increasing the throttle body bore size from the stock 64 mm to 72 mm, Skunk2 enables significantly more airflow into the engine, which enhances throttle response and supports higher power output for both naturally aspirated and turbocharged builds.

Machined from billet 6061-T6 aluminum and featuring a high-torque servo motor and advanced Hall-Effect TPS sensor, this unit is designed to bolt directly into the vehicle's electronic throttle system without requiring a motor swap. However, due to the larger bore, the stock intake tube may not fit properly - Skunk2 recommends pairing this throttle body with an aftermarket intake or a 3.15" to 3.00" coupler for optimal fitment and airflow. Installation is straightforward for experienced technicians and offers plug-and-play hardware included in the kit.

This part is ideal for performance enthusiasts upgrading their Civic Si for track use or high-rev builds, where throttle response and airflow are critical. Fitment is verified for model years 2006 through 2011; coverage for 2012+ or other chassis is **unconfirmed at this time**.