Honda F20C 52 mm EFI Shaftless ITBs – Direct‑to‑Head Throttle Bodies for S2000
AT Power’s 52 mm EFI Shaftless Individual Throttle Bodies (ITBs) deliver exceptional airflow and torque improvements for the Honda F20C engine. Designed to replace traditional 60 mm shafted ITBs, these direct-to-head units fit seamlessly into the standard S2000 engine bay – no modifications required
Compatible Engines:
- Honda F20C (S2000 AP1/AP2)
- Direct bolt-on for S2000 – no relocations or modifications required
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
- Optimised 52 mm Oval Housings: Offers better mid-range torque (10–15 ft-lb more) while matching airflow of 60 mm shafted ITBs—supports builds up to ~340 hp
- Bolt-On Compatibility: Pre-assembled to fit almost any F20C S2000 – fits under OEM bonnet, no need to relocate alternator or PS pump, and reversible
- Full OEM Component Use: Compatible with factory fuel rail, injectors, throttle cable, intake gasket, and thermostat housing
Performance Advantages:
- Increased horsepower and torque
- Lightweight and durable
- Sharper throttle response and increased engine performance
- Perfect for naturally aspirated and tuned applications
- Ideal for motorsport applications, track day builds, race cars or high-performance engine builds and street setups
If you require something more bespoke, please contact us.
Engine Relocation
For fitment into standard (OEM) vehicles, it may be necessary to relocate the power steering pump or alternator & replace the existing water pump with an aftermarket electric water pump to allow package clearance for the installation of these Throttle Bodies. These ancillary products are directly available through:
TEGIWA IMPORTS Ltd (UK) Press here for TEGIWA IMPORTS website.
Complete the setup:
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.



















