Catalytic Converter for Subaru Forester (2014-2018) 2.0L

Direct-Fit Stainless Catalytic Converter for 2014-2018 Subaru Forester (SJ)

What it Does: This direct-fit catalytic converter replaces the factory exhaust catalyst on 2014-2018 Subaru Forester 2.0XT (SJ/SJG) models equipped with the FA20F 2.0L Turbo H4 engine to restore emissions conversion and flow.

The Stock Subaru Forester Catalyst Failure

On the SJ Forester 2.0XT, the FA20F 2.0L Turbo H4 generates extreme exhaust gas temperatures under boost, subjecting the factory catalyst to severe thermal cycling. Over time, this heat soak degrades the precious-metal washcoat and fractures the internal ceramic core, causing loose substrate pieces to rattle and obstruct exhaust flow. Once oxygen storage capacity drops below ECU thresholds, the downstream O2 sensor triggers P0420/P0430 fault codes and creates excessive backpressure.

Common Symptoms of a Failing OEM Catalytic Converter

• Check Engine Light / DTCs: Persistent P0420/P0430 catalyst efficiency codes triggered by degraded washcoat oxygen storage.
• Metallic Substrate Rattle: Audible rattling beneath the chassis caused by thermal shock fracturing the internal ceramic brick.
• Backpressure & Emissions Failure: Sluggish turbo spool, elevated exhaust restriction, and failed emissions testing from clogged substrate debris.

The Direct-Fit Stainless Catalytic Solution

Engineered for the SJG platform, this direct-fit unit utilizes a corrosion-resistant stainless steel body (8-inch length, 5-inch height) and heavy-gauge tubing to resist rust and turbocharger heat cracking. Inside, a ceramic honeycomb substrate coated with a precious-metal washcoat converts HC, CO, and NOx emissions to satisfy OBD-II readiness monitors. Factory-matched flanges, an integrated mounting bracket, and dual pre- and post-catalyst O2 sensor ports allow a straight bolt-on installation without cutting or welding.

What's Included

• 1 x Catalytic Converter (Part #17669)

Technical Specifications

Compatibility

• 2014-2018 Subaru Forester 2.0XT Premium (2.0L Turbo H4)
• 2014-2018 Subaru Forester 2.0XT Touring (2.0L Turbo H4)
• Excludes 2.5L naturally aspirated Forester models

Frequently Asked Questions & Fitment Warnings

Does this fit the SJ Forester?

Yes. This is a direct fit for 2014-2018 Subaru Forester 2.0XT Premium and Touring trims equipped with the FA20F 2.0L Turbo H4 engine. It does not fit 2.5L models, and as an EPA federal (non-CARB) converter, it is not legal for vehicles registered in California, New York, Colorado, or Maine.

Will this clear P0420/P0430 codes, and are O2 sensors included?

Yes, when catalyst failure is the root cause. Replacing a worn converter restores efficiency to clear P0420/P0430 codes, provided you also inspect for exhaust leaks and verify O2 sensor operation. Oxygen sensors are not included; transfer your existing sensors or install new units into the two sensor ports.

Are gaskets included for installation?

No. The package includes the catalytic converter only; new flange gaskets must be sourced separately. Let the exhaust cool completely, apply penetrating oil to fasteners, torque all flange bolts evenly, and inspect every joint for leaks.

The Subaru Turbo Exhaust Standard

Unrestricted exhaust flow and accurate O2 sensor feedback are critical for crisp turbocharger spool and throttle response on the FA20F boxer platform. This stainless direct-fit converter restores factory backpressure balance and clean emissions compliance without custom fabrication.