Catalytic Converter for Honda Accord (2018-2022) 2.0L

Direct-Fit Stainless Catalytic Converter for 2018-2022 Honda Accord (CV2)

What it Does: This direct-fit catalytic converter bolts to the turbo outlet on 2018-2022 Honda Accord CV2 models with the K20C4 2.0L engine to restore emissions conversion and factory exhaust flow.

The Stock Honda Accord Close-Coupled Converter Failure

Mounted directly at the turbocharger outlet on the CV2 chassis, the factory close-coupled converter endures extreme exhaust heat soak from the K20C4 2.0L turbocharged I4. Severe thermal cycling degrades the catalytic washcoat and causes the brittle ceramic substrate to fracture inside the shell. Broken monolith fragments rattle under deceleration and restrict turbocharger spool by raising exhaust backpressure. Downstream oxygen sensors detect this conversion drop, setting catalyst-efficiency codes like P0420/P0430.

Common Symptoms of a Failing OEM Catalytic Converter

• Check Engine Light / DTCs: Persistent P0420/P0430 catalyst efficiency codes triggered by degraded washcoat activity.
• Metallic Substrate Rattle: Audible buzzing or rattling from the turbo downpipe area caused by a fractured core.
• Backpressure & Compliance Loss: Sluggish turbo spool, restricted flow, and failed emissions testing.

The Direct-Fit Stainless Exhaust Solution

Built with corrosion-resistant stainless steel tubing and an 8-inch by 5-inch shell, this converter resists heat cracking at the turbo outlet. Inside, a ceramic honeycomb substrate treated with a precious-metal washcoat restores efficient conversion of HC, CO, and NOx. Factory-style turbo flanges, support brackets, and a post-catalyst O2 sensor port guarantee bolt-on alignment on the CV2 chassis. No cutting or welding is required, restoring clean OBD-II operation on your K20C4 2.0L.

What's Included

• 1 x Direct-Fit Catalytic Converter
• 1 x 4-Bolt Flange Gasket
• 6 x Studs
• 6 x Nuts
• 6 x Washers

Technical Specifications

Compatibility

• 2018, 2019, 2020, 2021, 2022 Honda Accord 2.0T (Sport, EX-L, Touring) — CV2 / K20C4 2.0L Turbocharged I4
• Exclusions: Does NOT fit 1.5L Turbo or Hybrid models. EPA Federal compliant only (not CARB approved; not for vehicles registered in California, New York, Colorado, or Maine).

Frequently Asked Questions & Fitment Warnings

Does this fit the CV2 Accord?

Yes. This is a direct fit for the 2018-2022 Honda Accord equipped with the K20C4 2.0L engine. Excludes 1.5L turbo and Hybrid models; EPA federal only and not legal in CA, NY, CO, or ME.

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

Yes, for converter-related faults. A new core restores catalyst efficiency to clear P0420/P0430 codes; oxygen sensors are not included, so transfer or replace your existing sensors and check for exhaust leaks.

Are gaskets and mounting hardware included for installation?

Yes. The kit includes a 4-bolt flange gasket, six studs, six nuts, and six washers; soak cold fasteners with penetrating oil and torque evenly.

The Honda Performance Standard

Engineered for JDM turbo durability, this direct-fit converter restores exhaust flow efficiency and crisp throttle response on your CV2 Accord without restrictive backpressure.