Honda K20/K24 FN2 / FD2 45mm EFI Shaftless Individual Throttle Bodies (ITBs) – Direct-To-Head Bolt-On Kit
Experience sharper throttle response, improved airflow efficiency, and race-proven induction performance with AT Power’s 45mm EFI Shaftless Individual Throttle Body (ITB) system for Honda K-Series engines.
This Direct-To-Head (DTH) twin-housing ITB kit is precision port-matched to OEM intake ports on Honda K20A, K20A2, and K24 engines typically found in the Honda Civic Type R FN2, Honda Civic Type R FD2, Civic Type R GT, Civic Mugen RC, Accord Type R, and Honda Integra models running K-Series powerplants.
Designed specifically for standard FN2 and FD2 engine bay layouts, this plug-and-tune solution eliminates the extensive fabrication and engine bay modifications normally required when converting to ITBs, making it ideal for both road-going performance builds and competitive track applications.
Compatible Engines:
This 45mm EFI Shaftless ITB system is designed for Honda K-Series engines using OEM intake port geometry and standard engine bay layouts, including the following applications:
K20A / K20A2 found in:
- Honda Civic Type R (EP3, FN2)
- Acura RSX Type-S / Type-R
- Honda Integra DC5 (certain markets)
K24A series found in:
- Honda Accord Euro R
- Civic K24 swap engines
Any K24 engine maintaining OEM head and intake port pattern
While similar engine may share architecture, port shape and spacing can vary. Check the technical drawings match your inlet ports.
Key Features & Benefits:
- Patented Shaftless Butterfly Design: Eliminates central shaft to reduce turbulence, increasing airflow by up to 10% compared to conventional shafted ITBs
- 45mm Twin Housing Oval Shaftless Throttle Bodies: Precision CNC-machined billet aluminium housings featuring AT Power’s patented shaftless butterfly design.
- Under-Bonnet Clearance Guaranteed: Throttle bodies and air filter assembly sit comfortably below the factory bonnet line.
- Reversible Modification: Designed as a bolt-on system, allowing the vehicle to be returned to factory specification if required.
Performance Advantages:
- Improved Mid-Range & Top-End Power: Enhanced cylinder filling efficiency results in stronger mid-range torque and improved high-RPM power delivery.
- Supports Higher Power Builds: Ideal for stock engines and fully built high-RPM K-Series setups running aggressive cam profiles.
- Sharper throttle response and increased engine performance.
If you require something more bespoke, please contact us.
Complete your build. Sold Separately:
- AirFlow Synchrometer here.
- Megaflow Air Filter JC50/S/65 here.
- 3m Motorsport Cable here.
- Throttle Twin Housing – 1/8″ BSP to 5/16″ (8mm) Hosetail Fitting here.
Important:
- ECU Compatibility and Tuning Required: Proper engine management system tuning is necessary for optimal operation and fuelling.
- Maps are supplied “as-is”. Professional dyno tuning is strongly recommended to ensure optimal performance and avoid potential engine damage.
If you require something more bespoke, please contact us.
Motorsport Use Only! This product is designed for professional motorsport applications and must be installed by a qualified technician. If assistance is required, please contact AT Power’s sales team.
