Catalytic Converter for Honda Accord (2010-2012) 3.5L Bank 1 & Bank 2

Direct-Fit Bank 1 & Bank 2 Catalytic Converter Set for 2010-2012 Honda Accord (CP3/CS2)

What it Does: The Direct-Fit Bank 1 & Bank 2 Catalytic Converter Set replaces worn or contaminated front and rear exhaust manifold converters on the 2010-2012 Accord 3.5L to eliminate P0420/P0430 catalytic deficiency codes and restore unrestricted exhaust flow.

The Stock Honda Accord Substrate Degradation

Factory manifold-mounted catalytic converters on the CP3 (Sedan) and CS2 (Coupe) chassis operate in high-temperature environments directly off the cylinder heads. Over time, heat cycling and oil blow-by associated with Honda's VCM (Variable Cylinder Management) system contaminate the OEM ceramic washcoat. This poisoning of internal precious metals leads to sintered substrate degradation, localized restriction, and persistent check engine lights (DTC P0420 and P0430) that reduce engine efficiency.

The Engineering Solution

Manufactured as a bolt-in replacement assembly for the J35Z platform, this set features heavy-gauge, corrosion-resistant stainless steel shells paired with resilient ceramic honeycomb substrates. The catalyst brick is engineered with balanced cell density to optimize precious metal contact, converting hydrocarbons, carbon monoxide, and NOx into inert gases without producing parasitic exhaust backpressure. Precision-machined, laser-cut mounting flanges and integrated O2 sensor bungs allow a direct bolt-on installation using standard factory hang points.

Technical Specifications

Compatibility

• 2010-2012 Honda Accord EX 3.5L V6 (Sedan / Coupe)
• 2010-2012 Honda Accord EX-L 3.5L V6 (Sedan / Coupe)
• Positions: Bank 1 (Rear Manifold) & Bank 2 (Front Manifold)
• Emissions Standard: EPA Compliant (Not legal for sale or use in California or New York)

Frequently Asked Questions

Does this fit the CP3/CS2 Accord?

Yes, this is a direct fit for the 2010-2012 Honda Accord equipped with the J35Z 3.5L V6 engine.

Will this unit clear my P0420 and P0430 trouble codes?

Yes, the catalyst washcoat restores emissions conversion efficiency to factory standards, resolving threshold efficiency diagnostic codes once installed properly.

The Honda Powertrain Caliber

Restore the clean, high-revving throttle response and balanced exhaust acoustic profile engineered into Honda's naturally aspirated V6 with accurate, heavy-duty replacement hardware.