MagnaFlow Street Series Cat-Back Exhaust System

1997–1999 Jeep Wrangler TJ 2.5L & 4.0L I6

Part #: 15854

Overview

The MagnaFlow Street Series Cat-Back Exhaust System is a precision-engineered upgrade designed specifically for 1997 to 1999 Jeep Wrangler TJ models equipped with 2.5L and 4.0L inline-six engines. This system replaces the factory exhaust components from just after the catalytic converter to the rear exit, delivering improved exhaust flow and a distinctive, resonant engine tone that enhances your Wrangler’s rugged character without overwhelming cabin noise.

Ideal for Jeep enthusiasts who want to elevate their vehicle’s performance and sound quality while maintaining daily drivability, this exhaust system balances power gains with moderate exterior sound levels. Whether you own a Sahara, SE, or Sport model, this direct-fit cat-back system offers a durable, stylish, and functional upgrade that complements your Jeep’s adventurous spirit.

Key Features

Engineered for quality and performance, the MagnaFlow Street Series Cat-Back Exhaust System includes:

• Mandrel-bent 2.5-inch main piping for optimal exhaust flow and minimal restriction
• Single straight-through muffler design to maximize horsepower and torque gains
• Polished 2.75-inch welded-on single wall turndown cut edge tips for a sleek, aggressive appearance
• Cat-back layout replacing stock components from near the catalytic converter to the rear exit
• Extensive 3D scanning ensures precise, direct-fit installation with no cutting or welding required
• Manufactured using CNC precision robotic techniques for consistent quality and fitment
• Durable corrosion-resistant stainless steel construction for long-lasting performance
• Backed by MagnaFlow’s 1-year limited finish warranty and limited lifetime construction warranty
• Designed to produce moderate exterior sound and mild interior volume, perfect for daily driving

Construction & Design

This exhaust system is crafted from premium stainless steel, offering superior resistance to rust and corrosion compared to standard materials. The mandrel-bent tubing maintains a consistent diameter throughout bends, reducing turbulence and backpressure to improve exhaust scavenging and overall efficiency.

The single straight-through muffler design minimizes flow restriction while delivering a deep, aggressive exhaust note that complements the Jeep Wrangler’s rugged personality. Advanced CNC robotic manufacturing ensures each component meets exacting tolerances for a seamless fit and finish. Polished welded-on tips enhance visual appeal and resist discoloration and wear, maintaining a showroom-quality look over time.

Performance & Sound

Designed with dyno-proven performance in mind, this MagnaFlow exhaust system improves exhaust flow, contributing to enhanced throttle response and potential power gains. The signature MagnaFlow sound is characterized by a resonant, powerful tone that is assertive yet controlled. Exterior sound levels remain moderate to avoid unwanted attention, while interior sound is kept mild, allowing for an enjoyable driving experience without excessive cabin noise.

Installation & Fitment

The MagnaFlow Street Series Cat-Back Exhaust System is engineered for a direct bolt-on installation on 1997 to 1999 Jeep Wrangler TJ models with 2.5L or 4.0L engines, including Sahara, SE, and Sport trims. Thanks to extensive 3D scanning and precise manufacturing, this system fits perfectly without the need for cutting, welding, or additional modifications.

Installation can be completed with basic hand tools and moderate mechanical knowledge, making it accessible for DIY enthusiasts and professional installers alike.

What's Included

• Mandrel-bent 2.5-inch stainless steel main piping
• Single straight-through muffler
• Polished 2.75-inch welded-on single wall turndown cut edge exhaust tip
• All necessary clamps and hardware for installation
• Detailed installation instructions

Ideal For

This MagnaFlow exhaust system is perfect for Jeep Wrangler owners who want to enhance their vehicle’s performance and sound without sacrificing daily drivability. It suits enthusiasts seeking a durable, high-quality exhaust upgrade that delivers a sporty tone and improved exhaust flow. Whether you use your Wrangler for daily commuting, weekend adventures, or light off-roading, this system offers a balanced upgrade that elevates your Jeep’s presence on the road.

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.