Skunk2 309-05-0080 Pro Series 70mm Throttle Body for 02-06 Honda/Acura K20

Vehicle Fitment

• 2002-2005 Honda Civic Si (K20A/K20A2/K20A3/K20Z1)
• 2002-2006 Acura RSX Base & Type-S (K20A/K20A2/K20A3/K20Z1)

Fitment Notes

• Designed to pair with the OEM Acura RSX (PRB) intake manifold or a Skunk2 Pro Series intake manifold; other applications, including 2006+ Civic Si RBC manifolds, require an adapter plate
• Some retailers note "race only" / not CARB legal - not for sale or street use in California or other CARB states

Features

• CNC machined from forged billet 6061-T6 aluminum for strength and precision
• Hard anodized finish for corrosion resistance and durability
• Precision-machined brass throttle plate for consistent airflow control
• Sealed ball bearings for smooth, consistent throttle operation
• Retains the factory IACV (idle air control valve) circuit
• Compatible with OEM throttle cable for simplified installation
• Honed, oversized bore built for aggressive naturally aspirated and forced induction setups
• Includes new throttle body gasket and mounting hardware

Specifications

• Throttle Bore Diameter: 70mm
• Material: Forged Billet 6061-T6 Aluminum
• Finish: Hard Anodized
• Compatible Engines: K20A, K20A2, K20A3, K20Z1
• Matched Intake Manifold: OEM RSX (PRB) or Skunk2 Pro Series 307-05-0310

Included Components

• 1x Pro Series 70mm Throttle Body
• 1x Throttle Body Gasket
• 1x Mounting Hardware Kit

Product Description

The Skunk2 309-05-0080 Pro Series Throttle Body brings a 70mm bore to Honda K20A/K20A2/K20A3/K20Z1 engines in the 2002-2005 Civic Si and 2002-2006 RSX, built to increase airflow and unlock additional power throughout the powerband on modified applications. CNC machined from billet 6061-T6 aluminum and hard anodized for durability, it retains the factory IACV circuit and OEM throttle cable compatibility for a cleaner installation.

It's designed to pair with the factory RSX PRB intake manifold or Skunk2's own Pro Series manifold; pairing with a 2006+ Civic Si RBC manifold requires an adapter plate. A solid bolt-on upgrade for K20-powered Civic Si or RSX owners chasing more top-end airflow.