MagnaFlow Catalytic Converter

2001–2004 Jeep Grand Cherokee 4.0L I6

Part #: 458053

Overview

The MagnaFlow Direct Fit Catalytic Converter (Part #458053) is engineered specifically for 2001 to 2004 Jeep Grand Cherokee models equipped with the 4.0L inline-six engine, including Laredo, Limited, and Special Edition trims. This California Air Resource Board (CARB) compliant converter is designed to restore your vehicle’s emissions system to factory specifications, ensuring legal compliance and preventing check engine light issues.

Built as a direct replacement, it offers a seamless fit without the need for cutting or welding, making it an ideal solution for Jeep owners seeking a durable, high-quality catalytic converter that maintains optimal exhaust flow and engine performance.

Key Features

MagnaFlow’s catalytic converter combines advanced engineering and premium materials to deliver dependable emissions control and efficient exhaust flow. Key features include:

• CARB compliant for legal use in California and other CARB-restricted states
• Direct-fit design replicates original equipment spun body for precise fit and function
• Mandrel-bent tubing maintains OEM-like geometry for smooth exhaust flow and peak fuel economy
• Highly corrosion-resistant 16 gauge 409 stainless steel tubing for extended service life
• Single laser fusion weld on spun body reduces leak potential
• OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel to minimize noise and vibration
• Compact, low-mass design enhances thermal efficiency
• Precision stamped collector optimizes exhaust flow and engine efficiency
• Durable 308 stainless steel MIG welds for strong, lasting joints
• Includes essential gaskets and hardware for simplified installation

Construction & Design

This catalytic converter is expertly crafted from high-strength 16 gauge 409 stainless steel tubing, known for its excellent corrosion resistance and durability under harsh exhaust conditions. The spun body design replicates the original equipment manufacturer’s flow dynamics, ensuring factory-level performance and fuel efficiency are maintained.

The single laser fusion weld enhances structural integrity and minimizes the risk of exhaust leaks, while the mandrel-bent tubing preserves smooth exhaust flow by avoiding restrictions or turbulence. Additionally, OE-sized barbed exhaust hangers constructed from 410 stainless steel provide robust resistance to rust and reduce vibration-related noise. The precision stamped collector further improves exhaust flow, contributing to overall engine efficiency and fuel economy.

Installation & Fitment

Designed as a direct-fit replacement, this MagnaFlow catalytic converter installs easily on 2001–2004 Jeep Grand Cherokee Laredo, Limited, and Special Edition models with the 4.0L inline-six engine. Installation requires no cutting, welding, or modifications, making it suitable for professional mechanics and experienced DIY enthusiasts alike.

The package includes all necessary gaskets and mounting hardware to streamline the installation process. Following proper installation procedures and using the correct tools will ensure a secure, leak-free fit that restores your vehicle’s emissions system to optimal condition.

What's Included

• MagnaFlow Direct-Fit Catalytic Converter (Part #458053)
• Essential installation gaskets
• Mounting hardware

Ideal For

This catalytic converter is ideal for Jeep Grand Cherokee owners who need a reliable, CARB-compliant replacement to maintain emissions compliance and factory performance. It is perfect for those replacing a failing or damaged catalytic converter with a high-quality, direct-fit component that ensures smooth exhaust flow, reduces emissions, and prevents check engine light issues.

Emissions Note

This MagnaFlow catalytic converter is California Air Resource Board (CARB) compliant and legal for sale and use in all 50 states, including California, Colorado, New York, and Maine. 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 provides assurance of genuine compliance, making this converter a trusted choice for emissions-conscious Jeep owners.

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.