Catalytic Converter for Subaru WRX (2015-2021) 2.0L Turbo Front

Direct-Fit Front Catalytic Converter for 2015-2021 Subaru WRX (VA)

What it Does: The direct-fit front catalytic converter replaces the degraded primary catalyst on the 2015-2021 WRX to clear catalyst efficiency DTCs, restore exhaust flow balance, and ensure OBD II emissions compliance.

The Stock Subaru WRX Catalyst Degradation

Aggressive exhaust gas temperatures, sustained boost pressures, and direct-injection combustion blow-by in the factory FA20DIT engine accelerate thermal degradation of the stock primary substrate. Over time, internal ceramic breakdown compromises the precious-metal washcoat, causing exhaust restriction, loose substrate rattles inside the canister, and persistent P0420 check-engine illumination due to poor oxygen storage capacity.

The Engineering Solution

Engineered as a bolt-on solution for the VA platform, this front converter features a corrosion-resistant stainless steel body and mandrel-formed transition pipes designed to endure heavy heat cycling. Inside, a durable ceramic honeycomb core coated with a calibrated precious-metal washcoat efficiently oxidizes hydrocarbons and carbon monoxide while reducing nitrogen oxides. Precision-machined flanges, OE-located oxygen sensor bungs, and integrated factory-style brackets ensure a direct bolt-in fitment without cutting, welding, or exhaust leaks.

What's Included

• 1 x Front Catalytic Converter
• Gasket(s) and mounting hardware

Technical Specifications

Compatibility

• 2015 Subaru WRX 2.0L Turbo (Front)
• 2016 Subaru WRX 2.0L Turbo (Front)
• 2017 Subaru WRX 2.0L Turbo (Front)
• 2018 Subaru WRX 2.0L Turbo (Front)
• 2019 Subaru WRX 2.0L Turbo (Front)
• 2020 Subaru WRX 2.0L Turbo (Front)
• 2021 Subaru WRX 2.0L Turbo (Front)

Frequently Asked Questions & Fitment Warnings

Does this fit the VA WRX?

Yes, this is a direct fit for the 2015-2021 Subaru WRX equipped with the FA20DIT 2.0L Turbo engine. This part excludes WRX STI models equipped with the 2.5L EJ257 engine; rear converter is sold separately. Not legal for sale or use in California or CARB-adopting states.

Will this clear a P0420 code on my WRX?

Yes, replacing a fouled factory unit with this catalytic converter restores catalyst efficiency thresholds required by the factory ECU, provided oxygen sensors and pre-catalyst gaskets are in sound operating condition.

The Subaru Performance Caliber

Fabricated to withstand the intense thermal expansion and exhaust flow velocity of the twin-scroll turbocharged boxer engine, this replacement preserves true factory drivability and turbo spool characteristics.