Tomioka Racing Air Pump Delete kit for Subaru EJ20/EJ25

Free up space, simplify your engine bay, and get rid of a common failure point. The Tomioka Racing Air Pump Delete Kit is designed to eliminate the secondary air injection pump tubes that connect to the cylinder heads on Subaru EJ20 and EJ25 engines. Ideal for high-performance, track-only, or off-road applications, this kit cleanly seals the ports on the cylinder heads with precision-machined block-off plates.

Why delete the Subaru air pump?

• Remove a known weak point: Factory air pumps and valves are notorious for failure on EJ engines as they age.
• Cleaner engine bay: Fewer hoses, valves, and pipes makes working on the engine easier.
• Perfect for EJ swaps and builds: Useful when adapting later EJ255/EJ257 cylinder heads to earlier engines or custom setups.
• Track and race use: Popular upgrade for dedicated performance builds where emissions equipment has been removed where legally allowed.

Premium Tomioka Racing Construction

• CNC-machined from T6 aluminum for a precise fit on EJ20 and EJ25 cylinder heads.
• Titanium anodized finish for a clean, corrosion-resistant look in the engine bay.
• Complete kit – includes new gaskets and mounting hardware for a proper seal.

Kit Contents

• Air pump delete plates x 2
• Mounting bolts x 4
• Gaskets x 2

Specifications

• Material: T6 aluminum
• Finish / Color: Gunmetal, titanium anodized
• SKU: TR-ES2008
• Brand: Tomioka Racing

Vehicle Applications*

• 2004–2010 Subaru Impreza WRX STI (EJ25)
• 2002–2010 Subaru Impreza WRX (EJ20 / EJ25)
• 2005–2009 Subaru Legacy GT
• Any Subaru equipped with a secondary air pump system, using EJ20/EJ25 heads

*Final fitment may vary by market and engine configuration. Always confirm your engine code and air pump setup before ordering.

Installation Notes

• Professional installation is recommended.
• ECU tuning or codes may need to be addressed after removal of the secondary air system.
• For off-road, race, or competition use only where removal of emissions equipment is legal.