This Borla cat-back exhaust system is built for the verified 1999-2004 Ford Mustang GT application listed below. Select it by exact manufacturer part number 140067 and confirm the full engine, drivetrain, body, wheelbase, factory-exhaust, and Borla application notes before ordering.

Key Features

• 2.5″ Mandrel-Bent Tubing: Maximizes exhaust flow for dyno-proven horsepower and torque gains over stock system.
• Split Rear Exit with 4″ Tips: Bright chrome-finished T-304 stainless tips add bold stance and high-flow performance.
• S-Type Straight-Through Muffler: Cancels high-frequency drone while producing deep, aggressive exhaust note recognized by enthusiasts.
• Cat-Back Design: Replaces from catalytic converters back, improves CFM for better response with other mods like intake or tune.
• Easy bolt-on installation with no cutting or welding required.
• Direct bolt-on fit for factory hangers and mid-pipes on 4.6L V8 models.

Fitment

Specifications

What’s Included

One new Borla product identified by manufacturer part number 140067. Clamps, hangers, gaskets, tips, pipes, tools, and companion parts are included only when expressly listed for this exact part number.

About Borla

Borla develops stainless-steel exhaust systems, mufflers, tips, pipes, and related components for vehicle-specific and universal performance applications. Product selection remains exact-application and exact-part-number specific.

Related Borla Products

• Borla 99-04 Ford Mustang Cobra 4.6L/5.4L V8 MT RWD ATAK SS Catback Exhaust
• Borla 99-04 Ford Mustang GT 4.5L V8 AT/MT RWD 2dr ATAK SS Catback Exhaust
• Borla 2010 Mustang GT 4.6L V8 ATAK Catback Exhaust

Browse the Borla collection for related exhaust systems and components.

Frequently Asked Questions

Will this Borla part fit my 1999-2004 Ford Mustang GT?
That application is listed, but confirm the engine, drivetrain, body or cab style, wheelbase, factory exhaust layout, tip opening, and every Borla application note before ordering.

Will this change require an engine tune?
A cat-back, axle-back, tip, muffler, or post-catalyst component usually does not require tuning, but confirm the exact application, emissions configuration, oxygen-sensor locations, and local requirements before installation.

What should I inspect before installation?
Check the shipping carton and components against the exact part number, then inspect clamps, hangers, gaskets, mating flanges, clearances, tip alignment, and required reused factory hardware before removing the original exhaust.

Installation Instructions

Follow the current Borla instructions and vehicle service information for this exact part number. Let the exhaust cool, support the vehicle safely, compare all parts before removal, protect sensors and wiring, use the specified clamps and torque values, align all joints and tips without preload, confirm body and suspension clearance, check for leaks, and retorque after the first heat cycles. Professional installation is recommended.