Catalytic Converter for Acura TL (2009-2014) 3.5L 3.7L Front Left & Right

Direct-Fit Replacement Front Catalytic Converter Set for 2009-2014 Acura TL (UA8/UA9)

What it Does: The front catalytic converter set directly replaces deteriorated factory manifold converters on the 2009-2014 TL to resolve P0420/P0430 DTCs and restore optimal exhaust flow velocity.

The Stock Acura TL Catalytic Converter Degradation

Factory pre-cats mounted directly to the cylinder heads on the Honda/Acura J-series V6 operate under extreme thermal cycling and intense exhaust gas pulsations. Over high mileage, the original ceramic matrix breaks down, suffers washcoat sintering, or suffers structural melt-through. This deterioration triggers persistent diagnostic trouble codes (P0420, P0430), chokes high-RPM exhaust scavenging through excessive backpressure, and poses a risk of substrate dust being drawn back into the combustion chamber during valve overlap.

The Engineering Solution

This direct-replacement front left and front right catalytic converter assembly features a heavy-duty stainless steel casing designed to resist thermal fatigue and exterior corrosion. Internally, a high-flow ceramic honeycomb substrate coated with precious metal catalyst agents promotes rapid light-off and efficient hydrocarbon/NOx reduction without choking exhaust velocity. Precision-machined, thick flanges prevent exhaust leaks under high thermal expansion, engineered as a direct replacement for OEM 16643 and OEM 16658.

What's Included

• 2 Catalytic Converters (Front Left and Front Right)
• Mounting Hardware

Technical Specifications

Compatibility

• 2009-2014 Acura TL 3.5L V6 (UA8)
• 2009-2014 Acura TL 3.7L SH-AWD V6 (UA9)

Frequently Asked Questions & Fitment Warnings

Does this fit the UA8 and UA9 TL?

Yes, this is a direct fit for the 2009-2014 Acura TL equipped with the J35Z6 3.5L or J37A4 3.7L engine. Note: This assembly is not legal for sale, purchase, or use in California or New York emissions applications (non-CARB compliant).

Do the factory heat shields bolt onto these converters directly?

These aftermarket units do not fit the original factory heat shields perfectly, though the converters function fully without modification to the body or pipework.

The Acura Caliber

Keep your J-series V6 running at peak stoichiometric balance and full VTEC crossover performance with an exhaust solution built to handle aggressive power delivery and daily driving reliability.