The Skunk2 Pro Series Intake Manifold for the Honda K20Z3 engine is engineered as a direct high-performance replacement for RBC-style intake manifolds. Designed to improve airflow, mid-range power, and peak horsepower, this manifold features an oversized plenum and large tapered runners—ideal for naturally aspirated and turbocharged setups alike.
Cast from aircraft-grade A356 aluminum, this one-piece manifold offers improved runner geometry, thicker walls for porting, and sits at a lower profile than the OEM RBC manifold—making it an excellent fit for tight engine bays such as EF/DA K-swaps. Every unit is vacuum tested and finished with a Skunk2 Pro Series nameplate for quality assurance.
Key Features:
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Cast from high-strength A356 aircraft-grade aluminum
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Oversized plenum with large, tapered runners for maximum airflow
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72mm throttle body opening (can be ported to 76mm)
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Enhanced runner entries improve air velocity and venturi effect
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Compact design provides better hood clearance for engine swaps
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Thicker runner walls allow aggressive porting
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Direct bolt-on for OEM sensors and components
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Ideal for both turbocharged and naturally aspirated builds
Recommended Upgrades:
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Fuel Rail: Composite Fuel Rail (P/N 350-05-5015 )
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Throttle Bodies:
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Alpha 70mm (P/N 309-05-1060 )
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Alpha 74mm (P/N 309-05-1070 )
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Sensors:
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TPS Sensor (P/N 352-05-1410 )
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3-Bar MAP Sensor (P/N 352-05-1515 )
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4-Bar MAP Sensor (P/N 352-05-1500 )
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Thermal Gasket:
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Intake Manifold Gasket (P/N 372-05-0370 – Skunk2 Pro Series only)
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Vehicle Fitment:
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Honda Civic Si (2006–2011) with K20Z3 engine
Included:
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(1) Skunk2 Pro Series Intake Manifold