Description
ExhstSysKt
Borla(r) Performance Industries offers a slick bolt-on performance upgrade for the popular 2005-2009 Ford Mustang V6 4.0L. Borla(r) has an impressive heritage of Mustang exhausts, from the Grand-Am Champion Ford Racing Mustangs to the Hot Cobra R. The long list of Ford legends who have relied upon Borla(r) for their street and race cars includes Roush, Gentilozzi, Steeda, Saleen, Maffucci, Mihovetz, Bondurant and Shelby. Borla(r) has built many Mustang V6 project cars and considers the Mustang one of their prime muscle cars. The R & D staff dove into the V6 and created a superbly tuned Axle-Back exhaust (PN 11751) that exhibits solid double-digit horsepower numbers from the 2.5" exhaust and exits with a large 4" round, rolled, angle cut Borla(r) embossed bright chrome on T-304 stainless steel tip. As usual, the Borla(r) system is created with CNC mandrel bent, lightweight, durable, aircraft grade high quality T-304 stainless. Demonstrating an impressive 724cfm, it's an amazing 346cfm increase which accounts for the dramatic power gains along with subsequent mileage improvements. Borla(r) backs up this and all their street car exhausts with an industry leading no-strings Million-Mile Warranty. Bottom line is Borla(r) gives you a lot of reasons to upgrade your six-shooter, from over 1/3 lighter, more power, more torque, better mileage, lifetime warranty, exciting look and legendary Borla(r) growl. Old school or new, that's a deal. Borla(r), the original pioneers of high quality, T-304 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 and backed by an unsurpassed written Million-Mile Warranty.
Additional Information
S-Type Axle-Back Exhaust System 2005-2009 Ford Mustang 4.0L V6 Automatic/ Manual Transmission Rear Wheel Drive 2 Door Coupe/ Convertible.
Application Summary
2005-2009 Ford Mustang 4.0L V6 Automatic/ Manual Transmission Rear Wheel Drive/Coupe/ Convertible
Part Type
Exhaust System Kit
Product Overview
Borla Performance Industries offers a slick bolt-on performance upgrade for the popular 2005-2009 Ford Mustang V6 4.0L. Borla has an impressive heritage of Mustang exhausts, from the Grand-Am Champion Ford Racing Mustangs to the Hot Cobra R. The long list of Ford legends who have relied upon Borla for their street and race cars includes Roush, Gentilozzi, Steeda, Saleen, Maffucci, Mihovetz, Bondurant and Shelby. Borla has built many Mustang V6 project cars and considers the Mustang one of their prime muscle cars. The R & D staff dove into the V6 and created a superbly tuned Axle-Back exhaust (PN 11751) that exhibits solid double-digit horsepower numbers from the 2.5" exhaust and exits with a large 4" round, rolled, angle cut Borla embossed bright chrome on T-304 stainless steel tip. As usual, the Borla system is created with CNC mandrel bent, lightweight, durable, aircraft grade high quality T-304 stainless. Demonstrating an impressive 724cfm, it's an amazing 346cfm increase which accounts for the dramatic power gains along with subsequent mileage improvements. Borla backs up this and all their street car exhausts with an industry leading no-strings Million-Mile Warranty. Bottom line is Borla gives you a lot of reasons to upgrade your six-shooter, from over 1/3 lighter, more power, more torque, better mileage, lifetime warranty, exciting look and legendary Borla growl. Old school or new, that's a deal. Borla, the original pioneers of high quality, T-304 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 and backed by an unsurpassed written Million-Mile Warranty.
| Additional Application Notes | |
|---|---|
| • T-304 Stainless Steel 2.5 in.; Incl. Mufflers/Hardware/4 in. Round x 12 in. Long Single Rolled Angle-Cut Tip; Right Rear Exit;50 State Legal / California Emissions Compliant 2.5 in. Tubing; Incl. Mufflers/Hardware/4 in. Round x 12 in. Long Single Rolled Angle-Cut Tip; Right 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 17:21:46
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: | Rear Section Exhaust |
| Exhaust Type: | Axle-Back System |
| Exit Position: | Rear |
| Exit Style: | Single Right 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: | bor11751 |
| System Type: | Axle 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: | Borla Cat-Back(tm) Exhaust System - Touring |
| Title: | 2005-2009 Ford Mustang V6 Axle-Back Exhaust System |
| Tubing Diameter: | 2.500 in. |
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Borla, Borla Exhaust |
| StreetFX SKU | bor11751 |
| SFX Item ID | 4224887 |
| Accounting SKU | bor-11751 |
| Manufacturer SKU | 11751 |
| Manufacturer UPC | 808422117517 |
| Alternative References | BOR-11751 |
Exhaust System, Rear Axle Back, Stainless Steel, Natural, Polished Tip, Ford, 4.0L, V6, Kit
Borla S-Type axle-back exhaust systems replace the factory rear muffler(s) and exhaust pipe(s) and are installed behind a vehicle's rear axle. Following the same exhaust path and secured using the original hangers and rubber isolators, Borla axle-back (or rear section) performance exhausts are less restrictive than factory exhaust systems and improve the sound level both inside and outside the cabin.
S-Type axle-back exhaust systems use engine-specific (not universal) mufflers that are designed, tested, and optimized specifically for a particular year, make, and model. Improvements in sound and performance are accomplished by using superior muffler designs, mandrel-bent tubing, and the application of proper engine-matched tubing diameters. Welded tips are standard on most systems.
Many vehicles have a factory service-point in the exhaust system (flange or slip-fit) located in the exhaust tubing behind the rear axle; so most Borla S-Type axle-back installations are completed in less than an hour with no cutting of the factory system. Vehicles that don't have a factory service-point require cutting, so Borla includes easy-to-follow instructions and hardware to complete the installation.
Borla pioneered the use of aircraft-grade 304 stainless steel tubing, a material with a higher content of carbon and nickel that won't rust or corrode, for the automotive exhaust aftermarket … including Borla S-Type axle-back exhaust systems.
| Product Attributes | |
|---|---|
| UPC | 808422117517 |
| Brand | Borla |
| Tip Cut | Slant |
| Quantity | Sold as a kit. |
| Part Type | Exhaust Systems |
| Tip Shape | Round |
| Tip Finish | Polished |
| Exhaust Type | Single |
| Product Line | Borla S-Type Axle-Back Exhaust Systems |
| System Style | Rear axle-back |
| Tip Included | Yes |
| Tip Material | 304 stainless steel |
| Tip Quantity | 1 |
| Exit Location | Rear |
| Muffler Style | Turbo |
| System Finish | Natural |
| Inlet Quantity | 1 |
| Muffler Finish | Natural |
| Tip Edge Style | Rolled edge |
| System Material | 304 stainless steel |
| Muffler Included | Yes |
| Muffler Material | 304 stainless steel |
| Muffler Quantity | One |
| 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 |
| Manufacturer's Part Number | 11751 |
| Catalytic Converter(s) Included | No |
| Intermediate Pipe Diameter (in.) | 2.50 in. |
Brochures
Compatibility
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