Cat-Back System

WITHOUT Active Valves Exhaust. NOT recommended for use on Convertibles. This 3" diameter Cat-Back system contains a Merge X-Pipe for increased performance and improved sound. Includes 2) 3" O.D. x 2.25" O.D. x 7" long adapters for clamp on installation to the stock exhaust system. Do not use the adapters for full 3” inlets. The system delivers the classic S-Type sound with no drone inside the vehicle. Th system features dual 4" round bright chrome on T-304 stainless steel tips on each muffler. Systems with black chrome on T-304 stainless steel tips, and carbon fiber tips are also available. BORLA(r) Cat-Back & Axle-Back exhaust systems feature patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA(r) Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, BORLA(r) stands behind every system with a Million-Mile Warranty. Just what you’d expect from the world’s most experienced (and most winning) exhaust brand.

Additional Information

S-Type Cat-Back Exhaust System 2018-2023 Ford Mustang GT 5.0L V8 Automatic/ Manual Transmission Rear Wheel Drive 2 Door WITHOUT Active Valve Exhaust. NOT Recommended Convertible.

Application Summary

15-17 Ford Mustang GT (exc. Convertible) GT (exc. Convertible)

Part Type

Exhaust System Kit

Product Overview

WITHOUT Active Valve Exhaust. NOT recommended for use on Convertibles. 3" diameter system. System contains a merge X-Pipe for increased performance and improved sound. This system features bright chrome on T-304 stainless steel tips. BORLA(r) Cat-Back(tm) & Axle-Back exhaust systems feature patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA(r) Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer-controlled CNC manufacturing ensures an accurate fit. Best of all, BORLA(r) stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

• 3" diameter system
• For vehicles WITHOUT Active Valve Exhaust
• Includes adapters for connection to the stock system. Do not use adapters for full 3" inlets.
• NOT recommended for Convertibles
• System contains a Merge X-Pipe

Important Notice relating to US Domestic Market Trucks & Pickups

Many US-market trucks and pickups are available in multiple cab and bed-length configurations (e.g., Single Cab, Extended Cab, Double/Crew Cab, CrewMax, 5.5ft/6.5ft/8ft beds, etc.). Exhaust system fitment can vary between these chassis versions.

Where available, we list all compatible vehicles, cab types, and bed lengths in the product description. However, depending on your exact configuration, some systems may require optional extension/mid-pipes or minor modification for correct fitment.

Because of these variations, please carefully check your cab configuration and bed length before purchasing. If you are unsure, or if your vehicle has been modified, please reach out to a StreetFX agent.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Exhaust System, Cat-back, S-Type, 304 Stainless, Ford, Mustang GT, 5.0, S550, Without Active Exhaust, Polished Tip, Kit

Borla’s S-Type Cat-Back Exhaust System 140745 (WITHOUT Active Valve Exhaust) is NOT recommended for use on convertibles. This 3 in. diameter system contains a merge X-Pipe for increased performance and improved sound, as well as bright chrome on T-304 stainless steel tips. Borla cat-back and axle-back exhaust systems blend patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive Borla Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 stainless steel to deliver the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow and power, and precision computer-controlled CNC manufacturing facilitates an accurate fit. Best of all, Borla stands behind every system—just what you’d expect from the world’s most experienced (and most winning) exhaust brand.