The Coyote’s exhaust system is just as critical to power and efficiency as the rest of the engine and driveline package. Headers might not seem like much of a big deal in the big performance picture, but exhaust scavenging is important and was a great area of focus for Team Coyote.
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The Coyote has short tri-Y headers that were painstakingly thought out and executed by Ford engineers. These guys had to fight for them because it was everything to closing the power gap. Bean counters didn’t want them because they’re twice as costly to produce as cast-iron exhaust manifolds, yet crucial to emissions, power, and fuel economy.
Because the Coyote’s factory shorty header is unique with its equal-length style, it has enabled the Ti-VCT to produce some 400 ft-lbs of torque. You can get horsepower all day long. Torque is another story and a huge challenge for engineers and product planners. Enthusiasts always want more horsepower, but torque is what gets your mojo on. Torque should be your priority on the street.
Exhaust Refinement = More Power
Although Ford’s best engineers did an incredible job of exhaust system refinement there’s always room for improvement. It begins with a great aftermarket exhaust system if you’re seeking an easy upgrade. It is challenging to beat Ford’s factory Coyote headers. However, BBK, JBA, Ford Performance Racing Parts, and a host of others produce short- and long-tube headers for the Coyote. Your challenge is to determine which ones yield the greatest benefit for your Coyote. In Chapter 12 I test three header types on a 2011–2014 Ford Performance Racing Parts crate engine and give you the results.
Although long-tube headers are time-proven in terms of power, they aren’t always recommended for street applications. They aren’t always SMOG legal either. Any header you select for a street Coyote should be SMOG legal where you live. Ideally, you choose stainless or a ceramic-coated header. Chrome tends to rust with time and use, which makes it one of the least recommended choices.
Borla offers at least three muffler types for Coyote Mustangs and F-150s: Touring, S-Type, and Atak. Touring offers a soft throat, which is good for cruising. S-Type gets a little louder with less restriction. Atak is downright loud and snarly, a straight-through muffler void of restriction. Borla mufflers have always been the industry “loud” in all their many forms. And that’s the Borla trademark.
Stage 3 Motorsports
Stage 3 Motorsports puts a nice system together for the 2011–2016 Mustang. When it comes to achieving the sound that’s right for you Stage 3 Motorsports offers a nice selection of mufflers and systems. From a raspy race car sound to a deep and throaty muscle growl, these folks appear to have it covered. All Mustang exhaust systems come from top-quality manufacturers such as Magnaflow, Flowmaster, JBA Exhaust, Bassani, and Borla, and can give your Mustang additional horsepower and torque. Stage 3 also has high-performance headers and performance mid-pipes, which can yield a nice throat. Keep in mind that most long-tube headers and aftermarket mid-pipes require custom tuning to get their full power gains and avoid engine damage. Get a pro tune immediately after changing the exhaust system.
Roush Performance is another good source for Coyote exhaust systems, with everything from headers to mufflers, which improve high-end horsepower primarily. While you are shopping, check local smog laws to make sure these exhaust system mods are legal for your area.
A Broader Brush
As you shop exhaust systems think about why you are upgrading your exhaust system. Are you doing it for sound, performance, or both? Most mufflers, regardless of what manufacturers tell you, are engineered more for sound than performance. It is more the headers and mid-pipes that yield performance gains. When you’re shopping catalytic converters look at flow/restriction. Not all performance cats are performance cats. Not all X-pipes improve performance and sound. Header selection affects performance more than anything else. In addition, long-tube headers aren’t already better than shorties unless you’re going to all-out racing and high-RPM operation. Shorty headers are the champions of good low- and mid-range torque. Not all manufacturers call them shorty headers. Some call them “tuned length.”
Ford Performance Racing Parts Power Pack
GAS recently allowed access for the installation of a Ford Performance Racing Parts Power Pack exhaust system, which also includes a tune package you can dial in when the exhaust system is installed. GAS is a Ford Performance Racing Parts dealership tied directly to Galpin Ford/Lincoln in the heart of the San Fernando Valley of Southern California. GAS is only the latest innovation from Galpin Ford.
The Ford Performance Power Pack is a nice, affordable exhaust upgrade for 2011–2016 Mustangs and Mustang GTs, and it takes about an hour to install. GAS can do this for you or you can perform the installation in your garage or driveway. The result is more power and a snarly bark when you crack the throttle. You need to get a professional performance tune when you install this system.
Corsa 3.0-Inch Cat-Back System
CORSA Performance entered the exhaust business in 1998 and decided to rewrite the rulebook for what a performance exhaust should be. It introduced its own RSC (Reflective Sound Cancellation) Technology. RSC allows CORSA Performance to selectively target and eliminate resonant frequencies that cause that headache-causing drone in high-performance applications by reflecting sound waves out of phase, while custom tuning the exhaust note.
Every CORSA Performance exhaust system for the S197 and S550 Mustangs and F-Series trucks takes into account OEM design, desired performance output as well as interactions of the entire exhaust system. Think of each CORSA system as a custom application for the vehicle for which it was designed. Rarely are any two exhaust systems featuring RSC Technology the same.
BBK Performance offers a broad array of exhaust products from headers to mufflers. For off-road use only, BBK offers cat eliminators that go straight through to the X-pipe, tailpipes, and Vari-Tune mufflers. The BBK Performance 2015 Mustang GT test mule shows you what’s possible from your GEN 2 Coyote with charge motion induction. You will see numbers from BBK’s Tuned Length headers with cats and again with full-length headers without cats. BBK is using its own stainless long-tube headers, which for this testing eliminate the catalytic converters in off-road use only. BBK also offers high-flow cats for the long-tubes for street and race use. BBK Performance exhaust components are made right here in the United States in Southern California.
Written by Jim Smart and Posted with Permission of CarTechBooks