Catalytic Converter for Infiniti Q50 (2016-2023) 3.0L

Direct-Fit Stainless Catalytic Converter Pair for 2016-2023 Infiniti Q50 (V37)

What it Does: This direct-fit left and right catalytic converter set replaces worn factory emissions units on the 2016-2023 Infiniti Q50 (V37) powered by the VR30DDTT 3.0L Twin-Turbo V6, converting HC, CO, and NOx gases while clearing P0420/P0430 catalyst-efficiency codes.

The Stock Infiniti Q50 Catalytic Converter Failure

On the V37 chassis equipped with the twin-turbocharged VR30DDTT engine, factory primary catalytic converters endure extreme exhaust gas temperatures directly downstream of the turbocharger outlets. Over repeated thermal cycles, intense heat soak fractures the internal ceramic substrate and degrades the precious-metal washcoat, reducing oxygen storage capacity. Once the monolith breaks loose or becomes contaminated, downstream O2 sensors detect insufficient conversion efficiency, triggering persistent P0420 or P0430 codes while loose ceramic pieces rattle and restrict exhaust flow.

Common Symptoms of a Failing OEM Catalytic Converter

• Check Engine Light (P0420 / P0430): Downstream O2 sensors detect degraded catalyst oxygen storage efficiency on Bank 1 (P0420) or Bank 2 (P0430).
• Metallic Exhaust Rattle: Fractured internal ceramic honeycomb pieces vibrate inside the converter shell at idle or during deceleration.
• Sluggish Spool & Exhaust Backpressure: Collapsed substrate geometry chokes turbine outflow, reducing boost response and causing failed emissions inspections.

The Direct-Fit Stainless Exhaust Solution

Constructed from corrosion-resistant stainless steel tubing with an 8-inch by 5-inch converter body, this complete left-and-right assembly resists rust and thermal fatigue cracking. Inside each housing, a ceramic honeycomb substrate coated with a precious-metal washcoat restores proper catalytic conversion of HC, CO, and NOx to satisfy OBD-II readiness monitors. Precision-welded factory-style turbo flanges, mounting brackets, and integrated oxygen sensor bungs ensure a direct bolt-on replacement with zero cutting or welding required.

What's Included

• 2 x Direct-Fit Catalytic Converters (Left and Right)
• 2 x Ring Seals
• 2 x 2-Bolt Flange Gaskets

Technical Specifications

Compatibility

• 2016-2023 Infiniti Q50 3.0t Pure (V37 / VR30DDTT 3.0L Twin-Turbo V6)
• 2016-2023 Infiniti Q50 3.0t Luxe (V37 / VR30DDTT 3.0L Twin-Turbo V6)
• 2016-2023 Infiniti Q50 3.0t Premium (V37 / VR30DDTT 3.0L Twin-Turbo V6)
• 2016-2023 Infiniti Q50 3.0t Sport (V37 / VR30DDTT 3.0L Twin-Turbo V6)
• 2016-2023 Infiniti Q50 3.0t Sensory (V37 / VR30DDTT 3.0L Twin-Turbo V6)
• 2016-2023 Infiniti Q50 3.0t Signature Edition (V37 / VR30DDTT 3.0L Twin-Turbo V6)
• 2016-2023 Infiniti Q50 Red Sport 400 (V37 / VR30DDTT 3.0L Twin-Turbo V6)

Frequently Asked Questions & Fitment Warnings

Does this fit the V37 Q50?

Yes. This is a direct fit for the 2016-2023 Infiniti Q50 equipped with the VR30DDTT 3.0L twin-turbo V6 engine. Does not fit 2.0L turbo, 3.5L hybrid, 3.7L models, or the Infiniti Q60. Not CARB approved; illegal for sale or use on vehicles registered in California, New York, Colorado, or Maine.

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

Yes, it resolves catalyst-efficiency codes caused by a failed converter, though O2 sensors are not included. Replacing both banks restores exhaust conversion to clear P0420 and P0430 DTCs; transfer your existing sensors or install new O2 sensors while checking for exhaust leaks.

Are gaskets and mounting hardware included for installation?

Yes, two ring seals and two 2-bolt flange gaskets are included. Let the exhaust cool completely, soak seized turbo-side and bracket fasteners with penetrating oil, install the new gaskets, and torque all fasteners evenly before checking every joint for leaks.

The Infiniti Performance Standard

Restoring twin-turbo exhaust flow on the V37 platform is essential for maintaining crisp turbocharger spool, balanced bank-to-bank backpressure, and trouble-free OBD-II emissions compliance. Engineered for exact flange alignment and durable thermal performance, this converter pair keeps your VR30DDTT running cleanly without exhaust leaks or rattles.