This Borla cat-back exhaust system is built for the verified 2002-2008 Audi A4 Quattro application listed below. Select it by exact manufacturer part number 140100 and confirm the full engine, drivetrain, body, wheelbase, factory-exhaust, and Borla application notes before ordering.

Key Features

• T-304 Stainless Steel Construction: Premium material resists corrosion for lifelong durability in all conditions.
• Straight-Through Multi-Core Technology: Patented design accelerates exhaust flow for measurable power and torque increases.
• Direct bolt-on installation with no cutting or welding required.
• Bolt-on fit uses factory hangers and mounts on all listed A4 Quattro models.
• Over 40 years pioneering stainless steel exhaust for street and track.
• Full T-304 stainless steel construction with polished T-304 tips for shine and rust resistance.

Fitment

Specifications

What’s Included

One new Borla product identified by manufacturer part number 140100. 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 14-16 Audi A3 Quattro 2.0L Turbo AT/MT RWD 4DR S-Type Cat-Back Exhaust Single Split Rear Exit
• 2001-2006 Audi TT Quattro Cat-Back Exhaust System S-Type Part # 14957
• Borla 08-12 BMW 328i Sdm E90 2.0L RWD Dual Left Rear Exit Touring Cat-Back Exhaust

Browse the Borla collection for related exhaust systems and components.

Frequently Asked Questions

Will this Borla part fit my 2002-2008 Audi A4 Quattro?
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.