Borla EC-Type Cat-Back Exhaust Sustem for 2005-2009 Ford Mustang GT 4.6L V8 & Shelby GT500 5.4L V8 Automatic/ Manual Transmission Rear Wheel Drive 2 Door EC-Type Approved. (1014015)

Upgrading your factory exhaust system to a Borla stainless steel performance exhaust system with a more efficient and less restrictive design can improve sound (adding more enjoyment driving your vehicle) and increase engine horsepower and torque throughout the RPM range (allowing quicker acceleration to pass a vehicle or get to highway speeds quicker). Borla offers Axle Back exhaust systems, Cat back exhaust systems, and for select Competition-Use-Only vehicles, we offer long tube headers to replace your exhaust manifold for the best performance and sound.

The Borla "Cat Back™" name implies the exhaust system is located behind the factory catalytic converter where there factory emissions remain untouched and vehicle stays emissions compliant. This remains distinct from the Axle Back exhaust system that is located behind the rear axle. Alex Borla coined the phrase 'Cat Back' and introduced the Cat Back performance exhaust in 1978, a bolt-on replacement performance exhaust system requiring no welding, thus being secured using the factory hanger locations.

Borla Cat Back exhaust systems use engine-specific (not universal) mufflers that are designed, tested, and optimized specifically for a particular year/make/model vehicle. Borla Cat Back systems increase the overall sound level & performance. Vehicles that don't have a factory service-point require "cutting" the factory exhaust system before installing a Borla Cat Back performance exhaust system. Borla includes instructions where to make this cut and includes the hardware to complete the installation. Many of today's modern vehicles have a factory service-point in the exhaust system (flange or slip-fit) located in the exhaust tubing behind the catalytic converter. A Borla Cat Back performance exhaust system replaces the factory exhaust system (behind this service-point) following the same exhaust path and secured using the original vehicle hangars and rubber isolators. Borla pioneered the automotive exhaust aftermarket in exhausts constructed in aircraft grade 304 stainless steel tubing, a material with higher content of carbon & nickel that won't rust or corrode.

Features:

• Horsepower and Torque Increased by 7 – 10%
• Increased exhaust flow for better performance
• Better fuel economy at cruising speeds
• The most aggressive sound of any Borla system
• Custom designed for each application
• Patented straight-through, multi-core muffler design reduces backpressure while absorbing sound waves
• Mandrel-bent stainless steel tubes with diameters optimized for reduced restriction while maintaining exhaust gas speed
• Made from the finest austenitic stainless steel for long-lasting durability
• All welded construction
• Includes everything required for installation, including detailed instructions
• Backed by the exclusive Borla Million-Mile warranty
• Proudly made in the USA