Infiniti QX56 2011-2012, Stainless Steel Cat-Back Exhaust System by Borla®. AGGRESSIVE SOUND, Split Rear Exit, 2.25" Tubing, and 4" Single Round Rolled Angle-Cut Tips. When you want the best performing, best sounding, and highest quality exhaust system, you want Borla. Borla straight-through mufflers and mandrel-bent exhaust tubes are custom tuned to deliver the most horsepower possible, with that famous Borla "growl" of power. And the quality, aircraft-grade, austenitic stainless steel construction allows Borla to back every Cat-Back system with an unequaled million-mile warranty.
- Increased exhaust flow for better performance and a deeper, throatier exhaust note
- Horsepower and torque increased by 7 – 10%
- Better fuel economy at cruising speeds
- Custom designed for each application
- Patented straight-through muffler design reduces backpressure while absorbing sound waves
- Mandrel-bent stainless steel tubes with diameters optimized for reduced restriction while maintaining exhaust gas speed
- Made from the finest austenitic stainless steel for long-lasting durability
- All welded construction
- Includes polished exhaust tips
- Includes everything required for installation, including detailed instructions
- Backed by the exclusive Borla Million-Mile warranty
- Proudly made in the USA
Replacing your factory exhaust system with an aftermarket performance system is a significant investment in money and time. Of course, you can always try saving money and going with a cheaper system, but you may only get an irritating exhaust tone without any real gains in power. The only silver lining with such a system is that it probably won’t last, so at least you won’t have to put up with it for long. Instead of going that route, just install a premium Borla Cat-Back exhaust system. You’ll get the power and sound you want, with quality materials and construction that will make it the last exhaust system you’ll ever need to buy for your car.
Borla custom designs each exhaust system for the specific application, to make the most horsepower and torque with the best sound quality. The patented straight through muffler design reduces restriction and increases exhaust gas velocity, making sure each cylinder is completely evacuated to make room for the incoming charge. This design absorbs the sound waves without disturbing the power waves, in contrast to the chambered mufflers used by most aftermarket companies. Chambered mufflers use partitions or baffles to subdue sound waves, which also creates backpressure and reduces power.
The shape and diameter of the exhaust tubing is optimized for volume and exhaust gas velocity. Borla mandrel bends the stainless steel tubing for smooth bends and to make sure the pipe maintains its size and shape throughout the entire length. Tubes that aren't mandrel bent can lose a significant percentage of their diameter in sharp bends. This system features an "X" pipe, where the pipes behind the catalytic converter include a crossover junction. This junction reduces excessive backpressure created by close firing cylinders on one bank, allowing it to escape to the other side of the system, thereby improving low and mid-range torque.
But improved performance is only part of what you want in an aftermarket exhaust system, because all the horsepower in the world won't matter if it doesn't sound right. There’s no need to worry with a Borla System. They have many years of automotive acoustical experience and the company is staffed with automotive enthusiasts just like you that listen and drive cars to make sure your system has the right sound to go with the power.
However, the best power and sound is meaningless if the exhaust system rots away in a few years. Borla uses the finest materials and construction techniques to make sure this won't happen. They use austenitic stainless steel for their systems, which contains high levels of nickel and chromium, to resist corrosion. This material is harder than the lower grade stainless steel used by the OEM manufacturers, yet is very ductile. Nevertheless, the increased hardness requires special equipment to form and bend. The muffler contains stainless steel perforated tubes wrapped with several layers of stainless steel sound absorbing material and a layer of ceramic sound absorbing, high temperature material, all contained in a fully welded stainless steel shell.
The Borla Stainless Steel Cat-Back Exhaust System comes complete with everything required for installation, including detailed instructions. Borla is so confident in the quality of this system that it’s guaranteed against defects in materials and workmanship for one million miles.1,161.09Brand: Borla Part Number: 140478 UPC: 808422504782
Borla® is the leading manufacturer of stainless steel performance exhaust products. The company began three decades ago making exhaust systems for concours classic Rolls Royce and Ferrari models, and gradually evolved to become the premier manufacturer of performance exhaust products for street, off-road and racing. Borla pioneered many improvements in the design of performance exhaust systems, holds several patents for innovative exhaust system technology, and has won numerous “Best New Product” awards. Today the company operates a state of the art research and development center in Oxnard, California, and makes all of its products at a world-class manufacturing facility in Johnson City, Tennessee.Borla® - Stainless Steel Cat-Back Exhaust System - Split Rear Exit Reviews (3)Customers' rating: 4.5 OF 5APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITY(5)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITYBORLA Cat-Back for FX 50S| Posted by Aaron B. | 2012 Infiniti FX50 (Bartlesville, OK)
I Love this performance exhaust! It is exactly what I was looking for in both performance and sound. At start-up there is a very nice growl that subsides to a low rumble, but doesn't impinge on the occupants of the vehicle. At normal cruising speeds, there is Zero drone! I can tell that there is more throatiness while driving but it is very slight. However, when I put the juice to it, the sound coming out is a symphony! What I desired and what Borla has achieved is that unless I am hammering the accelerator no one knows that I have a Beast of a car. It is fantastic. Now to some real world numbers. I have not placed the car on a dyno yet, but will be in the next few weeks. I have put over 1,000 miles on the car with the new exhaust. I also installed new K&N filters so I am not sure how to attribute percentages to just the BORLA exhaust, but take these numbers for what they are...data. Again, I don't have HP increases yet, but I do have performance numbers. My MPG has increased dramatically. I am now getting 1.8 MPG in city driving and I have gained 3.3 MPG on highway driving. To show the numbers here they are before and after: 16.2 MPG before and 18 after, which is an 11% gain for city driving. 20.2 MPG before and 23.5 after, which is a 16.3% gain for highway driving. I am not a professional driver by any means, but I was able to shave .3 seconds off of my best time in 0-60 after install if the new filters and BORLA exhaust. I can also tell that the car is much more peppy. It has increased throttle response and is so ready to run when I give it the juice. All around I am so very happy with the BORLA exhaust. It has unleashed an already fast car and made it sound like a race-car!Was this review helpful for you? YesNo(4)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITYBorla Cat Back Exhaust| Posted by Patrick R. | 2009 Infiniti G37 (Vero Beach, FL)
This exhaust system sounds great on the Infiniti. There is hardly any drone at all on highway. However, get on the gas and the sound comes alive.Was this review helpful for you? YesNo
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