BBK® 4011 - CNC Series™ Dual Exhaust Conversion X-Pipe

0 reviews|Item # mpn1968122 View Similar Products
In Stock (7) - Ships in 24 to 48 hrs
Vehicle Specific
Fits Following Model(s):
  • Please Select Vehicle Below
Select Vehicle
Add To Cart
Add to Wishlist
Authorized Dealer

Have a Question? Ask a Specialist

888.634.9437Live Chat
Low Prices. Price match guarantee
Guaranteed Fitment. Always the correct part
In-House Experts. We know our products
Easy Returns. Quick & Hassle Free
Select VehicleSelected Vehicle
Do not see your vehicle here?   View similar products

Product Details

CNC Series™ Dual Exhaust Conversion X-Pipe by BBK®. Main Piping Diameter: 2.5". Give your V6 Mustang a power boost and GT looks and sound with this Dual Exhaust Conversion Kit. It includes a high-flow X-Pipe, high-flow catalytic converters, and a driver’s side tailpipe. Use your existing passenger’s side pipe and connect to the axle-back GT muffler kit of your choice and you’ll have more power with the high-performance looks and rumble of dual exhaust. The kit even includes a template to cut out the driver’s side exhaust opening.


Series: CNC Series™
Main Piping Diameter: 2.5"
Converter Configuration: Universal Fit


  • Converts Mustang V6 single exhaust to dual exhaust
  • Direct bolt-on installation; no pipe cutting or welding required
  • X-pipe allows exhaust from both banks to exit using both sides of the exhaust system, for the least restriction and greatest exhaust flow
  • Large diameter tubes are CNC mandrel bent to maintain consistent flow throughout the length of the exhaust
  • Include factory style flanges for a perfect connection to factory exhaust manifolds or shorty headers
  • Includes high-flow catalytic converters and O2 sensor bungs
  • Includes driver’s side tailpipe
  • Requires separate purchase of aftermarket axle-back Mustang GT exhaust system
  • Includes template to cut out driver’s side exhaust opening
  • Comes with detailed installation instructions
  • Limited 1-year warranty
  • Proudly made in the USA

Reducing restriction to let an engine “breathe” is one of the oldest and most well-known modifications and personified by “dual exhaust”. Letting both banks expel exhaust through their own separate paths was long thought to be the best for performance and definitely superior to a “single” exhaust system, like the one that comes stock on a V6 Mustang, where both banks feed into a single pipe. Today we know that even dual exhaust can be improved upon with an X-Pipe and that’s what you get with this Dual Exhaust Conversion Kit from BBK.

On a V-type engine close firing cylinders are competing for space in the exhaust pipe, which creates backpressure and reduces power. When close firing cylinders are exhausting on one bank, there is nothing happening in the other bank, so merging both sides with an X-Pipe effectively enlarges the exhaust system, allowing these exhaust pulses to exit through both sides of the system. The exhaust pressure on both banks is equalized and power is increased at all engine speeds.

This dual exhaust conversion with X-pipe is a bolt-on installation, with no pipe cutting or welding required. The X-Pipe with high-flow catalytic converters replaces the stock Y-pipe and factory converters. Connect the factory passenger’s side tailpipe and install the new driver’s side tailpipe, then connect both pipes to an aftermarket axle-back exhaust system for a Mustang GT. A template is included to cut out the bumper for the other exhaust tip, or a GT bumper cover can be used. With this kit you’ll get increased performance from reduced exhaust restriction, as well as great dual exhaust looks and sound.

The BBK Dual Exhaust Conversion Kit comes with detailed instructions to guide you through the installation. Every kit is backed by a 1-year limited warranty against defects in materials or workmanship, as long as the product was installed according to BBK guidelines and not used for racing.

BBK Performance® is the No. 1 manufacturer of EFI performance parts and accessories. For over 20 years the company has concentrated its resources on the development and manufacture of performance parts and accessories for late model electronically fuel injected vehicles. These parts include large bore, high-flow mass air meters and throttle bodies, intake manifolds, high-flow fuel rails and high-volume fuel pumps, and cold air intake kits. The company also manufactures an extensive line of high-tech headers and exhaust pipes, and state-of-the-art suspension and steering components. Along with their commitment to EFI, the company is also dedicated to designing and manufacturing the highest quality parts and accessories right here in the USA. To that end, the company operates 2 large design and manufacturing facilities in Temecula, California as well as a large distribution center located in Daytona Beach, Florida.

Part Number:


All BBK products, including CAI systems, air filters, exhaust systems, headers and other products, are warrantied against any defect in materials or craftsmanship for a period of one year from the date of purchase.

These terms apply as long as it has been established that the product in question was installed and used in accordance to all BBK guidelines and was not used for racing or competition purposes.

BBK Performance will not be held responsible for any consequential or incidental damages incurred during installation and will not be held responsible for any incidental or additional labor/storage charges on any products that are defective, damaged, or purchased incorrectly. (Please note some product specifics are NOT covered by warranty, such as coatings/finishes, bushings and hoses, etc.)

An original receipt showing the date of purchase must also be supplied or the warranty is null and void – please be sure to include your name, return address and contact phone number. If a defect is determined, the item will be immediately fixed or replaced at no cost to the consumer.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

Ford Mustang
2009 Ford Mustang
  • Base
2008 Ford Mustang
  • Base
2007 Ford Mustang
  • Base
2006 Ford Mustang
  • Base
2005 Ford Mustang
  • Base
Low Prices Price match guarantee
Guaranteed Fitment Always the correct part
In-House Experts We know our products
Easy Returns Quick & Hassle Free

All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only. It is neither inferred nor implied that any item sold by is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.