Catalytic Converter for Infiniti Q50 (2014-2015) 3.7L Left & Right

Direct-Fit Replacement Catalytic Converter Pair for 2014-2015 Infiniti Q50 (V37)

What it Does: The direct-fit Left & Right catalytic converter set replaces deteriorated factory catalytic units on the 2014-2015 Infiniti Q50 to eliminate P0420/P0430 diagnostic trouble codes and restore factory exhaust velocity.

The Stock Infiniti Q50 Substrate Degradation

The high-revving VQ37VHR engine operates with sustained exhaust gas temperatures (EGTs) exceeding 1,400°F under load. Over time, thermal cycling degrades the factory washcoat on the OEM ceramic cores, leading to catalyst poisoning, internal sintering, and core breakup. This breakdown creates severe exhaust backpressure, impedes scavenging efficiency across both cylinder banks, and triggers persistent catalyst efficiency check engine lights.

The Engineering Solution

Engineered as a bolt-in replacement for the V37 platform, this matched left and right converter assembly features heavy-gauge stainless steel outer shells that resist road-salt corrosion and thermal fatigue. Internally, high-flow ceramic monolith honeycombs provide balanced surface-area-to-flow ratios to maximize chemical reduction without choking the 3.7-liter V6. Precision-cut, thick-gauge flanges ensure a flat, leak-free seal to factory exhaust manifolds and mid-pipes, eliminating exhaust leaks that skew upstream and downstream oxygen sensor readings. Both converters match OEM dimensional geometry for plug-and-play installation with OE references 15H5485, 15H5484, 16197, and 16198.

Technical Specifications

Compatibility

• 2014 Infiniti Q50 Base 3.7L V6 (VQ37VHR)
• 2014 Infiniti Q50 Premium 3.7L V6 (VQ37VHR)
• 2014 Infiniti Q50 Sport 3.7L V6 (VQ37VHR)
• 2015 Infiniti Q50 Base 3.7L V6 (VQ37VHR)
• 2015 Infiniti Q50 Premium 3.7L V6 (VQ37VHR)
• 2015 Infiniti Q50 Sport 3.7L V6 (VQ37VHR)

Frequently Asked Questions

Does this fit the V37 Q50?

Yes, this is a direct fit for the 2014-2015 Infiniti Q50 equipped with the VQ37VHR engine.

Will these converters resolve P0420 and P0430 DTC codes?

Yes, replacing depleted OEM units with this functional catalyst pair restores emissions reduction efficiency to clear factory catalyst threshold fault codes.

The Infiniti Benchmark

Preserve the distinct high-RPM exhaust acoustics and high-revving power delivery of your VQ37VHR powertrain with direct-fit exhaust hardware built to withstand rigorous daily performance.