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Part 2: Brenspeed’s making horsepower with its High-Mile Coyote 2011 Mustang GT
Last month we brought you Stage 1 of Brenspeed’s High-Mile Coyote build, a 2011 Mustang GT with 160,000 miles. Brenspeed’s Brent White wanted to see the viability of purchasing a high-mile 2011-2014 Mustang GT for the dragstrip. Brent wanted to see what the engine looked like after that many miles, and to see if the engine was healthy enough for performance modifications.
Stage 1 consisted of making sure the engine was ready for battle by replacing the timing chains, tensioners, sprockets, and all usual maintenance items. Plus, the intake side of things was opened up thanks to a Ford Performance intake manifold and cold air intake.
In stock form the car was good for 359 horsepower at the wheels. After the initial round of intake upgrades, that number went north to just shy of 400 horsepower. This time around Brenspeed is installing a complete Kooks exhaust, BMR suspension, and Strange Engineering’s 10-way adjustable shocks and struts.
Check out the captions for the full rundown, and stay tuned for more updates on Brenspeed’s High-Mile Coyote 2011 Mustang GT.
1. Anytime you have a stack of boxes like this in the shop, and one of them is labeled “large header box,” you know two things. First, it’s about to get loud. Second, you’re in for a bit of work. In the case of Brenspeed’s High-Mile Coyote 2011 Mustang GT, Brent White and the rest of the Brenspeed crew added a full Kooks exhaust, Race Star wheels, Mickey Thompson tires, including components from Strange Engineering, Ford Performance, and BMR Suspension.
2. Brenspeed used Kooks long-tube headers, a 3-inch X-pipe, and corresponding after-cat exhaust. The long-tube headers feature 1 7/8-inch primary tubes with a 3-inch collector to merge with what Kooks calls its Green catted X-pipe. Brent chose the 1 7/8-inch headers because he plans to use a power adder at some point, and wanted to make sure he had the exhaust flow needed to take advantage of that added power. Kooks says its ultra-high performance Green catalytic converters are 49-state legal. Unfortunately, the Green catted X-pipe still isn’t legal in California, but you can use them with a factory after-cat exhaust to keep the sound police away from you. Of course, Brenspeed is mostly only concerned with dragstrip noise ordinances, and thankfully, this car easily complies with any track decibel levels. Kooks’ after-cat exhaust is also 3-inches, and features 4-inch polished tips.
3. Along with a complete Kooks exhaust system, Brenspeed’s High-Mile Coyote received a full allotment of BMR Suspension components. Brenspeed added a tubular K-member with A-arms, tubular radiator support, and drag springs up front. Out back, they added an upper control arm mount, adjustable upper and lower control arms, lower control arm relocation brackets, upper panhard rod support, double-adjustable panhard rod, and drag springs. Brent likes BMR’s tubular suspension components because they offer a dramatic weight savings over the stock components; up front, Brent noted a weight savings of over 60 pounds.
4. To add adjustability to the High-Mile Coyote’s suspension, Brenspeed added Strange Engineering 10-way adjustable front struts and rear shocks. Brent likes the Strange shocks and struts because they present a budget-minded solution for increased suspension adjustability. These shocks and struts give you the best of all worlds from the street to the dragstrip.
5. We always recommend putting a Mustang on a lift to inspect its underside before purchasing the car. The underside of the High-Mile Coyote might scare away most buyers, but knowing the majority of these items would be replaced, Brenspeed forged ahead. Being a northern car with 160,000 miles, the underside’s condition was expected.
6. You can see the difference between the factory front lower control arms and the BMR examples. BMR offers both non-adjustable and adjustable front lower control arms with your choice of standard or tall height ball joint.
7. With the exhaust and suspension installed, the car is ready to be dropped back down to the ground and put on the dyno. As you can see, a BMR anti-roll bar has also been installed to get the most of the newfound horsepower.
8. Speaking of newfound horsepower, the Kooks exhaust brought the latest numbers up to 417 rwhp with 370 lb-ft of torque.