Description
ExhstSysKt
For over 4 decades, BORLA® Exhaust has been the choice of Mustang experts. Major players in the racing industry and leading tuners from Roush, Steeda, Saleen and Ford Racing to the Shelby 427 Cobra have relied on BORLA®. This 2.5" diameter Cat-Backâ„¢ system bolts behind the factory H-pipe and is lighter than the factory system. BORLA® experience and advance engineering have produced the classic "S-Type" exhaust with outstanding flow numbers that generate great power enhancements, with no drone inside the vehicle. These attributes, coupled the BORLA® sound of power and big single 4" round chrome on T-304 stainless steel tips on each muffler assembly, proclaim this Stang is all business. Airflow management and exhaust engineering is a science with which BORLA® has more experience than anyone in the exhaust aftermarket. The performance matches the famous BORLA® systems of the past but with a unique muffler and exhaust configuration canceling additional high frequency sound waves. Delivering a significant increase in exhaust flow CFM from the factory system which, as most engine builders will confirm, accounts for the dramatic power improvements. Perhaps more importantly, this added flow maximizes performance for other aftermarket enhancements installed on the Mustang because all BORLA®
Additional Information
S-Type Cat-Back Exhaust System 2005-2009 Ford Mustang GT 4.6L V8/ Shelby GT500 5.4L V8 Supercharged Automatic/ Manual Transmission Rear Wheel Drive 2 Door Coupe/ Convertible.
Application Summary
2005-2009 Ford Mustang GT 4.6L V8/ 2007-2009 Mustang Shelby GT500 5.4L V8 Supercharged Automatic/ Manual Transmission Coupe/ Convertible.
Part Type
Exhaust System Kit
Product Overview
For over 4 decades, Borla Exhaust has been the choice of Mustang experts. Major players in the racing industry and leading tuners from Roush, Steeda, Saleen and Ford Racing to the Shelby 427 Cobra have relied on Borla. This awesome Cat-Back system bolts behind the factory H-pipe, is lighter than the factory system and includes our famous "S-Type" mufflers (PN 140135). X-Pipe (PN 60092) may be added to this system. Borla experience and advance engineering have produced a sexy "S-Type" exhaust with outstanding flow numbers that generate great power enhancements. These attributes, coupled with an aggressive sound of power and awesome big bright chrome on T-304 stainless steel tips, proclaim this Stang is all business. Airflow management and exhaust engineering is a science with which Borla has more experience than anyone in the exhaust aftermarket. The performance matches the famous Borla systems of the past but with a unique muffler and exhaust configuration canceling additional high frequency sound waves. Delivering a significant increase in CFM from the factory system which, as most engine builders will confirm, accounts for the dramatic power improvements. Perhaps more importantly, this added flow maximizes performance for other aftermarket enhancements installed on the Mustang because all Borla exhaust products are tuned for maximum output from any aftermarket performance upgrade. Two Axle-Back system options are also available: an aggressive "S"-Type (PN 11750) and a more mellow Touring (PN 11752) - both replace only the over-the-axle pipes, mufflers and tips. Borla, the original pioneers of premium, high-quality T- 304 austenitic stainless steel (superior to 409 or aluminized steel) free-flow exhaust utilizes patented award and race winning technology to deliver quality, sound, performance gains and enhanced fuel economy - all with an easy bolt-on installation. Best of all, each system come with the unsurpassed Borla Million-Mile Warranty.
| Additional Application Notes | |
|---|---|
| • T-304 Stainless Steel 2.5 in.; Incl. Connecting Pipes/Mufflers/Hardware/4 in. x 12 in. Long Single Round Rolled Angle-Cut Tip; Split Rear Exit;50 State Legal / California Emissions Compliant 2.5 in. Tubing; Incl. Connecting Pipes/Mufflers/Hardware/4 in. x 12 in. Long Single Round Rolled Angle-Cut Tip; Split Rear Exit; | |
| • 2.5 in. Tubing; Incl. Connecting Pipes/Mufflers/Hardware/4 in. x 12 in. Long Single Round Rolled Angle-Cut Tip; Split Rear Exit; | |
| • S-Type Cat-Back Exhaust System; 2.5 in.; Incl. Connecting Pipes/Mufflers/Hardware/4 in. x 12 in. Long Single Round Rolled Angle-Cut Tip; Split Rear Exit; 2.5 in. Tubing; Incl. Connecting Pipes/Mufflers/Hardware/4 in. x 12 in. Long Single Round Rolled Angle-Cut Tip; Split Rear Exit; | |
These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.
Data: v2 - Desc: v4.2 - Upd: 2026-11-07 17:21:27
Features
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.
Specifications
Product Details
| Construction: | All Welded |
| Description: | S-Type; Cat-Backâ„¢ System |
| Exhaust Type: | Cat-Back(tm) System |
| Exit Position: | Split Rear |
| Exit Style: | Single Split Rear Exit |
| Grade Type: | Performance |
| Inlet Inside Diameter: | 2.500 in. |
| Inlet Size (in.): | 2.5 |
| Material: | T-304 Stainless Steel |
| Muffler Type: | Straight-Through |
| Off Road Use Only: | No |
| Outlet Outside Diameter: | 2.500 in. |
| Outlet Size (in.): | 2.5 |
| Part Number: | bor140135 |
| System Type: | Cat Back |
| Tail Pipe Diameter: | 2.500 in. |
| Tail Pipe Material: | Stainless Steel |
| Tip / Outlet Finish: | Bright Chrome On T-304 Stainless Steel |
| Tip Diameter: | 4 in. |
| Tip Size: | 4.0in |
| Title Extended: | Mustang GT/ Mustang Shelby GT500 2005-2009 Cat-Back(tm) Exhaust System S-Type Part # 140135 |
| Title: | 2005-2009 Ford Mustang GT/ Mustang Shelby GT500 Cat-Back(tm) Exhaust System S-Type |
| Tubing Diameter: | 2.500 in. |
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Borla, Borla Exhaust |
| StreetFX SKU | bor140135 |
| SFX Item ID | 4224636 |
| Accounting SKU | bor-140135 |
| Manufacturer SKU | 140135 |
| Manufacturer UPC | 808422401357 |
| Alternative References | 140135, BOR-140135 |
Exhaust System, S-Type, Cat-Back, Dual, Stainless Steel, Natural, Split Rear Exit, Ford, 4.6L, Kit
Borla S-type cat-back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower in your 2005 through 2009 Mustang 4.6L and 5.4L, and produce a more aggressive sound and higher flow. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive Borla Sound of Power respected by motoring enthusiasts everywhere. Each Mustang exhaust system is built from premium 300-Series austenitic 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 and power, and precision computer-controlled CNC manufacturing ensures an accurate fit. Best of all, Borla stands behind every 2005-09 Mustang exhaust system with a Million-Mile Warranty. It's just what you'd expect from the world's most experienced (and most winning) exhaust brand.
| Product Attributes | |
|---|---|
| UPC | 808422401357 |
| Brand | Borla |
| Notes | Includes "S-type" high flow aggressive tone mufflers. |
| Tip Cut | Slant |
| Quantity | Sold as a kit. |
| Part Type | Exhaust Systems |
| Tip Shape | Round |
| Tip Finish | Polished |
| Exhaust Type | Dual |
| Product Line | Borla S-Type Cat-Back Exhaust Systems |
| System Style | Cat-back |
| Tip Included | Yes |
| Tip Material | 304 stainless steel |
| Tip Quantity | 2 |
| Exit Location | Split rear |
| Muffler Style | Turbo |
| System Finish | Natural |
| Inlet Quantity | 2 |
| Muffler Finish | Natural |
| Tip Edge Style | Rolled edge |
| System Material | 304 stainless steel |
| Muffler Included | Yes |
| Muffler Material | 304 stainless steel |
| Muffler Quantity | Two |
| Hardware Included | Yes |
| Special Attention | It is illegal to install parts or components that bypass, defeat, or render inoperative the manufacturers’ technology and design necessary to reduce vehicle emissions to meet state and federal Clean Air Act standards. |
| Muffler Configuration | Single inlet/Single outlet |
| Tip Outlet Size (in.) | 4.00 |
| Tailpipe Diameter (in.) | 2.50 in. |
| Manufacturer's Part Number | 140135 |
| Catalytic Converter(s) Included | No |
| Intermediate Pipe Diameter (in.) | 2.50 in. |
Brochures
Compatibility
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