Catalytic Converter for Infiniti Q40 (2015) 3.7L Left & Right

Direct-Fit Catalytic Converter Pair for Infiniti Q40 (V36)

What it Does: The direct-fit Left and Right Catalytic Converter set replaces degraded factory converters on the Infiniti Q40 to eliminate P0420/P0430 DTCs, restore exhaust scavenging efficiency, and ensure federal emissions compliance.

The Stock Infiniti Q40 Catalytic Breakdown

Factory catalytic substrate blocks inside the V36 exhaust system face aggressive degradation over extended heat cycles. In the high-revving VQ37VHR 3.7L engine, exhaust gas temperatures frequently cause washcoat sintering, internal ceramic core breakdown, and cell fracturing. Over time, restricted internal passages trigger catalyst inefficiency codes (P0420 and P0430), choke high-RPM scavenging dynamics, and sap power from the factory 328-horsepower curve.

The Engineering Solution

Engineered as an exact bolt-on assembly, this converter set uses durable stainless steel outer shells paired with high-efficiency ceramic honeycomb monoliths loaded with active noble metal washcoats. Mandrel-formed profiles and thick, laser-cut mounting flanges match factory manifold studs and intermediate y-pipe hookups precisely, requiring no cutting or custom fabrication. Factory-positioned oxygen sensor bungs keep O2 sensors at the correct depth for accurate lambda closed-loop tuning while lowering backpressure across the entire rev range.

Technical Specifications

Compatibility

• 2015 Infiniti Q40 Base Sedan 4-Door 3.7L 3696CC V6 GAS DOHC Naturally Aspirated
• 2015 Infiniti Q40 AWD Sedan 4-Door 3.7L 3696CC V6 GAS DOHC Naturally Aspirated

Frequently Asked Questions

Does this fit the V36 Q40?

Yes, this is a direct fit for the 2015 Infiniti Q40 equipped with the VQ37VHR engine.

Will this pair resolve catalyst efficiency check engine lights?

Yes, replacing deteriorated factory units with this active ceramic pair restores emissions reduction capacity and turns off P0420/P0430 trouble codes.

The Infiniti Performance Standard

The V36 sports sedan platform relies on balanced exhaust velocity to generate immediate throttle response and signature VQ acoustics without rasp or cabin drone.