Borla S-Type Cat-Back Exhaust System with Polished Tips (140135) - 2005-2009 Mustang GT 4.6L & Shelby GT500 5.4L V8
Wake up the high-performance spirit of your muscle car with the high-impact Borla S-Type Cat-Back Exhaust System. Custom-engineered for 2005 to 2009 Ford Mustang GT and 2007 to 2009 Shelby GT500 models, this premium full-length exhaust upgrade introduces Borla's legendary acoustic profile: the classic S-Type sound level. Formulated explicitly for driving enthusiasts and muscle car purists who crave a highly aggressive, race-inspired exhaust note under acceleration, this system is calibrated to give the 4.6L 3-Valve V8 and the supercharged 5.4L V8 engines a bold, crisp, and high-impact growl. This configuration delivers a commanding exterior acoustic presence while relying on advanced straight-through internals backed by Borla's official No-Drone Guarantee to keep the cabin completely comfortable and drone-free during highway cruising, daily commuting, or spirited track runs.
The internal engineering of the Borla 140135 targets key factory flow restrictions by incorporating an upgraded high-efficiency performance layout featuring a full dual 2.5-inch main pipe diameter that bolts directly behind the factory H-pipe assembly. This lightweight architecture utilizes ultra-smooth mandrel bends and a unique muffler configuration that cancels additional high-frequency sound waves while delivering a massive increase in exhaust flow CFM over the restrictive factory configuration. This dramatic optimization of airflow dynamics maximizes horsepower, throttle response, and torque across the entire powerband, while providing plenty of extra flow capacity for additional aftermarket performance upgrades down the road like cold air intakes, custom tuning, or headers. Built completely from premium-grade, aerospace-quality T-304 austenitic stainless steel, this highly durable cat-back assembly defends permanently against structural degradation, intense under-car heat cycling, and severe corrosion. The spent exhaust gases exit through a distinctive dual split rear configuration featuring large 4-inch round, rolled angle-cut bright chrome on T-304 stainless steel tips on each muffler assembly. Precision CNC-manufactured for an accurate line-to-line bolt-on fitment, this system utilizes all factory mounting positions and is backed by Borla's legendary lifetime Million-Mile Warranty.
Chassis & Configuration Notes: This cat-back system is engineered specifically for the S197 first-phase generation Mustang platform equipped with either the 4.6L SOHC V8 or the supercharged 5.4L DOHC V8 engines. It is fully compatible with both Automatic and Manual transmissions and fits 2-Door Coupe and Convertible Rear-Wheel Drive (RWD) models. It will not fit V6 base models or later 2010-2014 rear bumper configurations without modification due to specific exhaust hanger and valance cutout positioning variations.
Features
- Aggressive S-Type Acoustic Profile: Delivers a deep, loud, and pure muscle car roar under load with a highly controlled cabin presence
- High-Flow Dual 2.5-Inch Architecture: Aerospace-grade mandrel-bent performance piping maximizes exhaust gas velocity and clearing capacity
- Wave-Canceling Technology: Advanced muffler internal geometry eliminates high-frequency harshness while maximizing flow CFM
- Lightweight Performance Design: High-tech T-304 construction drops significant dead weight compared to the heavy factory exhaust assembly
- Optimized for Power Adders: Added flow efficiency maximizes performance gains for other aftermarket enhancements installed down the line
- Borla No-Drone Guarantee: Advanced straight-through and multi-core acoustics ensure an upgraded exterior note with absolute zero cab resonance
- Constructed completely from premium-grade T-304 austenitic stainless steel for permanent structural integrity and ultimate rust resistance
- Classic Polished Styling: Finished with eye-catching dual 4-inch round, rolled angle-cut bright chrome on T-304 stainless steel tips
- Symmetrical Split Rear Exit: Outlets route cleanly to a single cutout on each side of the rear bumper valance for a balanced, high-performance aesthetic
- True Bolt-On Architecture: Precision computer-numerical control (CNC) manufacturing ensures an accurate, line-to-line fitment
- Backed by Borla's unmatched, industry-leading written Million-Mile Warranty
Detailed Vehicle Fitment Breakdown
Compatible Model Years:
This system fits the following individual model years under the specific chassis, body, engine, and drivetrain constraints listed below: 2005, 2006, 2007, 2008, 2009 Ford Mustang GT & Shelby GT500 (Early S197 Platform Only).
Ford Mustang GT & Shelby GT500 Fitment Breakdown (V8 RWD Automatic / Manual):
Fits 2-Door Coupe and Convertible models with Automatic or Manual Transmissions:
- 2005 Ford Mustang GT: 4.6L SOHC 3V V8 RWD (Coupe / Convertible)
- 2006 Ford Mustang GT: 4.6L SOHC 3V V8 RWD (Coupe / Convertible)
- 2007 Ford Mustang GT / Shelby GT500: 4.6L 3V / 5.4L Supercharged V8 RWD (Coupe / Convertible)
- 2008 Ford Mustang GT / Shelby GT500: 4.6L 3V / 5.4L Supercharged V8 RWD (Coupe / Convertible)
- 2009 Ford Mustang GT / Shelby GT500: 4.6L 3V / 5.4L Supercharged V8 RWD (Coupe / Convertible)
Important Application & Compatibility Notes:
- **Placement Requirement:** Designed to bolt up directly behind the factory mid-pipe / H-pipe assembly location.
- **Engine Versatility:** Engineered to accommodate both the naturally aspirated 3-valve 4.6L GT V8 and the heavy-duty cooling requirements of the supercharged 4-valve 5.4L Shelby V10 powertrain.
- **Premium Materials:** Built entirely with authentic T-304 stainless steel to deliver superior rust resistance over lower-grade T-400 series choices.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
