MagnaFlow Catalytic Converter

2004–2006 Jeep Wrangler 4.0L I6

Part #: 458027

Overview

The MagnaFlow Direct Fit Catalytic Converter (Part #458027) is engineered specifically for 2004 to 2006 Jeep Wrangler models equipped with the 4.0L inline-six engine. This California Grade CARB-compliant converter is designed to maintain your vehicle’s emissions compliance while ensuring optimal engine performance and fuel efficiency. It is a direct replacement for factory catalytic converters, crafted to keep your Jeep’s exhaust system functioning properly without triggering check engine lights.

Ideal for Jeep Wrangler owners seeking a reliable, easy-to-install catalytic converter that meets or exceeds California Air Resource Board (CARB) standards, this part supports legal use in all 50 states, including California and other CARB-restricted regions. Whether you are restoring your Wrangler’s exhaust system or replacing a failing converter, this MagnaFlow unit offers a durable, high-quality solution that preserves factory performance and emissions compliance.

Key Features

MagnaFlow’s catalytic converter combines advanced engineering and premium materials to deliver a seamless replacement that supports your Jeep’s emissions and performance needs. Key features include:

• California Grade CARB compliant for legal use nationwide, including California, Colorado, New York, and Maine
• Direct-fit design requiring no cutting, welding, or modifications for straightforward installation
• Mandrel-bent tubing that maintains OEM-like geometry for smooth exhaust flow and optimal fuel economy
• Highly corrosion-resistant 16 gauge 409 stainless steel tubing for extended durability in harsh environments
• Single laser fusion weld on the spun body design to minimize leak potential and enhance structural integrity
• Precision stamped collector design optimized for efficient exhaust flow and engine performance
• OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel to reduce noise and vibration
• Torca AccuSeal® exhaust clamps providing 360-degree clamping force to prevent pipe distortion and ensure a complete seal
• Includes essential gaskets and hardware for hassle-free installation, even when replacing corroded factory parts

Construction & Design

This catalytic converter is expertly crafted using high-strength 16 gauge 409 stainless steel tubing, selected for its exceptional corrosion resistance and long service life. The spun body design replicates the original equipment manufacturer (OEM) part, featuring a single laser fusion weld that enhances structural integrity and reduces the risk of exhaust leaks.

Mandrel-bent tubing preserves the original exhaust geometry, ensuring smooth flow dynamics that maintain factory performance and fuel efficiency. The precision stamped collector further optimizes exhaust flow, contributing to improved engine efficiency. Additionally, the OE-sized barbed exhaust hangers are made from corrosion-resistant 410 stainless steel, helping to minimize noise and vibration for a quieter, more comfortable ride.

Installation & Fitment

The MagnaFlow direct-fit catalytic converter is designed for a straightforward, bolt-on installation on 2004 to 2006 Jeep Wrangler 4.0L I6 models. No cutting, welding, or modifications are required, making it an ideal replacement for factory converters. The included hardware and gaskets simplify the installation process, even when dealing with corroded or seized factory components. This converter is a direct interchange for OE parts 5205 9681AE and 5205 9681AA, ensuring a precise fit and reliable operation.

What's Included

• MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter (Part #458027)
• Essential gaskets for proper sealing
• Installation hardware including Torca AccuSeal® exhaust clamps

Ideal For

This catalytic converter is ideal for Jeep Wrangler owners who require a CARB-compliant replacement part that maintains emissions standards and factory performance. It suits those looking for a durable, corrosion-resistant solution that installs easily and supports long-term vehicle reliability. Whether restoring your Wrangler’s exhaust system or replacing a failing converter, this MagnaFlow part offers peace of mind and legal compliance.

Emissions Note

This catalytic converter is certified to meet or exceed California Air Resource Board (CARB) requirements and has undergone additional testing to comply with CARB guidelines. It is legal for sale and use in all 50 states, including California and other CARB-restricted states, for the specified Jeep Wrangler models. Installation is permitted only if the vehicle’s Executive Order (EO) number and Engine Family Number (EFN) appear in this converter’s CARB Executive Order documentation.

MagnaFlow is a performance exhaust manufacturer best known for cat‑back and axle‑back systems, mufflers, and catalytic converters engineered for quality sound and improved flow. Their vehicle-specific exhaust options span muscle, import, and truck applications—making MagnaFlow a staple upgrade when you want a deeper tone, cleaner fitment, and a proven performance-focused exhaust setup.