Borla 11985 S-Type Axle-Back Exhaust System Kit for Mustang GT 5.0L

The Borla 11985 is a premium 2.5-inch diameter axle-back exhaust system specifically engineered for the 5.0L Ford Mustang GT equipped with Active Valve Performance Exhaust. This system fits both coupe and convertible models and delivers the legendary Borla S-Type sound—aggressive when you want it, refined when you don't, with no drone inside the cabin.

Polyphonic Harmonizer Technology:

Borla's patented Polyphonic Harmonizer technology utilizes pipes of different diameters and lengths within the muffler to create multiple exhaust notes that harmonize together. The result is a clean, rich, full-bodied sound that sets Borla apart from the competition.

Key Features:

• 2.5-inch mandrel-bent tubing for maximum exhaust flow and power gains
• 4-inch bright chrome tips on premium T-304 stainless steel
• Straight-through and patented multi-core design unleashes hidden horsepower
• Increased exhaust velocity improves power, throttle response, and fuel economy
• Ultra-smooth mandrel bends eliminate restrictive crush bends
• Precision CNC manufacturing ensures perfect fitment
• Compatible with Active Valve Performance Exhaust systems

Construction and Warranty:

Constructed entirely from premium T-304 stainless steel—far superior to T-400 series alternatives like 409 stainless—this system is built to last. Borla backs every exhaust system with their industry-leading Million-Mile Warranty, demonstrating their confidence in the durability and performance of their products. When you choose Borla, you're choosing the world's most experienced exhaust brand with a proven track record in motorsports and street performance.