Catalytic Converter for RAM 1500 (2011-2018) 5.7L Left & Right

Direct-Fit Catalytic Converter Assembly for 2011-2018 RAM 1500

What it Does: The Left and Right Catalytic Converter assembly replaces depleted or restricted factory emissions units on the 2011-2018 RAM 1500 to restore exhaust scavenging efficiency, eliminate P0420/P0430 diagnostic trouble codes, and maintain federal emissions compliance.

The Stock RAM 1500 Substrate Degradation and Thermal Stress

Factory catalytic converters on the DS platform frequently encounter thermal fatigue from repeated heavy towing duty cycles and cylinder deactivation (MDS) thermal fluctuations. Over time, the stock ceramic brick suffers washcoat erosion, catalyst poisoning, and structural sintering. This breakdown leads to core meltdown or severe exhaust backpressure, robbing exhaust velocity from the 5.7L HEMI Eagle V8, reducing manifold scavenging, and tripping persistent downstream oxygen sensor check engine lights.

The Engineering Solution

This direct-fit left and right catalytic converter assembly is engineered with a heavy-duty stainless steel outer shell designed to withstand rigorous off-road vibration and high exhaust gas temperatures (EGT). Inside, an optimized ceramic honeycomb substrate is coated with an advanced precious metal washcoat to maximize catalytic conversion efficiency without restricting flow. Precision-machined, thick OE-style flanges ensure leak-free mating with existing exhaust manifolds and mid-pipes. The direct replacement package includes required installation hardware and high-temp composite gaskets, retaining factory O2 sensor bungs for true plug-and-play installation without cutting or custom fabrication.

Technical Specifications

Compatibility

• 2011-2018 RAM 1500 (5.7L V8 Gas, Left & Right Placement)

Frequently Asked Questions

Does this fit the DS 1500?
Yes, this is a direct fit for the 2011-2018 RAM 1500 equipped with the 5.7L HEMI Eagle engine.

Is this catalytic converter legal for road use in California?
No, this unit is an EPA-compliant federal catalytic converter and cannot be legally sold or installed on vehicles registered in CARB-restricted states.

The RAM Towing Durability Standard

Engineered to handle severe duty cycles, heavy payload hauling, and intense grade towing, this emissions assembly restores low-end torque and high-temperature integrity to keep your truck running reliably under load.