Honda K20 / K24 K-Series Engine Billet Aluminium RBC / RRC Dual Throttle Body Adapter (62mm / 70mm Dual Bore)

Adapt your K-series throttle body to a different intake manifold with this premium billet aluminium dual throttle body adapter, precision CNC-machined from 6061-T6 aluminium for permanent durability and a clean engine bay aesthetic. The Honda K-series engine platform uses several different intake manifold and throttle body combinations across various model years and applications — and many serious K-series builders choose to mix and match components for optimal flow characteristics. The most popular swap is using a base K20A3 throttle body with a higher-flowing performance intake manifold like the RBC, RRB, RBB, RRC, or RSP. This adapter solves the bolt pattern mismatch with a precision-machined dual-bore solution (62mm AND 70mm) that allows clean integration of K20A3 throttle bodies onto premium K-series performance intake manifolds, eliminating the need to source matching throttle body and manifold combinations.

Features:

• Dual-bore design – includes both 62mm and 70mm bore sizes in a single adapter for maximum flexibility across throttle body / intake combinations
• Premium 6061-T6 aluminium construction – aircraft-grade aluminium delivers exceptional strength, lightweight performance, and long-term durability
• CNC machined precision – manufactured using latest-generation CNC technology for high dimensional accuracy and clean OE-grade fitment
• Anodized surface finish – delivers superior corrosion resistance and a clean black aesthetic that complements engine bay theming
• Includes sealing ring and gasket – snug-fit components ensure leak-free operation under sustained boost or vacuum conditions
• Complete mounting hardware included – ready for installation without sourcing additional fasteners
• Direct bolt-on adapter design – enables clean integration of mismatched throttle body and intake manifold combinations

Specifications:

• Condition: 100% Brand New
• Type: Dual Throttle Body Adapter
• Material: 6061-T6 Billet Aluminium (Aircraft-Grade)
• Construction: CNC Machined
• Surface Finish: Anodized
• Color: Black
• Bore Sizes: 62mm & 70mm (Dual Configuration)
• Item Weight: 0.46 kg
• Quantity: Complete Adapter Kit
• Position: Between Throttle Body & Intake Manifold
• Engine Compatibility: Honda K-Series (K20 / K24 family)
• Purpose: Performance Adapter / Throttle Body to Intake Manifold Conversion

Compatible Throttle Bodies:

• Honda Civic Si K20A3 throttle body (2002 – 2005)
• JDM Honda Integra Type R K20A throttle body (2001 – 2006)
• JDM Honda Civic Type R K20A throttle body (2001 – 2005)

Compatible Intake Manifolds:

• JDM Honda Accord Euro R RBC manifold (2002 – 2008)
• Honda Civic Si RRB manifold (2006 – 2011)
• Acura TSX RBB manifold (2006 – 2011)
• JDM Honda Civic Type R RRC manifold (2007 – 2011)
• EDM Honda Civic Type R RSP manifold (2007 – 2011)

Engine Compatibility:

• Honda K20 (K20A / K20A1 / K20A2 / K20A3 / K20Z1)
• Honda K24 (K24A and variants)
• Compatible with K-series engine swaps and rebuilds using mixed throttle body and intake manifold combinations

Contents:

• 1x Dual Throttle Body Adapter (62mm / 70mm)
• 1x Sealing Ring
• 1x Gasket
• All necessary mounting hardware included

Benefits:

• Enables mixing and matching of K-series throttle bodies and intake manifolds – critical for builders optimizing flow characteristics for specific applications
• Adapts the popular K20A3 throttle body to higher-flowing RBC, RRB, RBB, RRC, or RSP intake manifolds – one of the most common K-series performance combinations
• Aircraft-grade 6061-T6 billet aluminium construction permanently outlasts factory components and provides clean appearance for serious engine bay aesthetics
• CNC-machined precision ensures perfect fitment between throttle body and intake manifold without modification – eliminates risk of vacuum leaks or sealing issues
• Dual-bore design (62mm and 70mm) maximizes flexibility – this single adapter works across multiple throttle body / manifold combinations
• Anodized finish maintains the premium aluminium appearance and corrosion resistance for the lifetime of the engine build
• Significant cost savings compared to sourcing matching throttle body and manifold combinations – enables flexible build configurations using readily available components
• Complete kit with sealing components and hardware – no additional sourcing required for installation

Critical Compatibility Notes:

• Acura RSX base model exclusion: Does NOT fit the Acura RSX base model (2002-2006) K20A3 engine when using its original intake manifold and throttle body configuration
• Throttle body sourcing: Only compatible with K20A3 throttle bodies sourced from the Honda Civic Si (2002-2005) or JDM Type R applications listed above
• K-series swap context: This adapter is specifically designed for K-series engine swap and performance build applications where throttle body and intake manifold mismatches occur

Installation Notes:

• Component compatibility verification required: Confirm both your throttle body and target intake manifold are listed in the compatibility sections above before ordering – mismatched components outside the listed compatibility will not fit properly
• Allow the engine to fully cool before beginning installation to avoid burns from hot engine components
• Carefully disconnect the existing throttle body from the original intake manifold – take note of all sensor connections, vacuum lines, and throttle linkage routing
• Clean both the throttle body mounting flange and intake manifold flange thoroughly before installation – any debris or old gasket material will compromise sealing
• Position the new gasket and sealing ring per the included instructions – proper orientation is critical for leak-free operation
• Mount the adapter between the throttle body and intake manifold using the included hardware
• Tighten all mounting hardware to factory torque specifications using a calibrated torque wrench – follow proper criss-cross torque sequence to prevent flange warping
• Reconnect all sensors, vacuum lines, throttle linkage, and electrical connections to their original positions
• Test for vacuum leaks using a smoke test or carb cleaner spray method to verify leak-free operation before driving
• Verify proper throttle operation through full travel range before driving – check for binding, sticking, or incomplete return to closed position
• After installation, scan for stored fault codes and clear any historical codes from the previous configuration
• ECU tuning recommended: Optimal performance with mixed throttle body and intake manifold combinations typically requires ECU tuning – consult with a K-series tuning specialist for optimal calibration
• Professional installation strongly recommended unless you have experience with K-series throttle body and intake manifold service procedures
• If unsure about compatibility with your specific K-series engine, throttle body, or intake manifold combination, contact our team with all component part numbers and source vehicles before ordering

Warranty:

• 12-month standard warranty from date of purchase
• Contact our support team for assistance with any issues