Honda F20C 52 mm Direct‑to‑Head Throttle Bodies for S2000 – OEM Fuel Rail

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

Product Details:

• Aerospace Grade Billet Aluminium patented “Shaft-less” 45mm Throttles
• 70mm Curved Black Laser Sintered PA12 Nylon Extensions
• 40mm Open Aluminium Ram Pipes (trumpets)
• Centre Cable Pull Linkage
• Right Hand Side TPS Mounting
• Installation Guide
• Ideal for builds up to ~340 hp; for higher state-of-tune, consider supporting mods like injectors, fuel pressure regulator, and intake upgrades.

Performance Advantages:

• Achieves similar airflow to shafted 60 mm ITBs while maintaining superior mid-range torque – ideal for street-driven performance
• Produces an extra 10-15 ft‑lbs of torque versus larger, shafted setups
• Sharper throttle response and increased engine performance
• 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 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.