American Muscle Builds Roush-Supercharged 2014 Mustang GT
Justin from American Muscle gives his 2014 Mustang GT a heaping dose of power with a side of extra traction.
American Muscle is staffed by Mustang fanatics just like the rest of us. The main difference is awesome access to parts and a YouTube channel to show off their builds. Justin from American Muscle has been busy with a new baby, and had to neglect his 2014 GT for a while, but that’s about to change.
The video starts off with a bang, ripping off the old Cobra Jet manifold and going forced induction with the aid of a Roush Phase 3 TVS supercharger. Justin went with this setup because it’s known to make big power on Coyote motors, and it offers usable powerband for combination street/strip cars like his.
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The installation is involved, but fairly smooth. The most stressful part is breaking out the grinder to clearance some parts of the timing cover. Wiring is never fun, so that could be a hurdle to potential DIYers — good thing detailed installation instructions are available.
When you’re adding forced induction, it’s important to feed your power-adder a steady diet of air and fuel. To that end, Justin added 1000cc injectors to make sure his Coyote was getting the fuel it needed to make big power.
To handle that big power, Justin’s GT was fitted with a McLeod RST twin-disc clutch — good up to 800 horsepower — and a lightened steel flywheel. It’s not the most extreme setup available, but it’s still beefy enough for Justin’s goals of a street/strip car, without being unnecessarily rough on the somewhat fragile MT-82 transmission. It’s important to pick the right parts for your application. A Barton short-throw shifter, a braided stainless clutch line, and an aluminum driveshaft complete the drivetrain mods for this stage of Justin’s build.
Lastly, Stainless Works long-tube headers are fitted to improve exhaust flow and sound. Again, this is a dual-purpose street/strip car, so Justin went with high-flow cats to stay emissions-legal. A Corsa sport cat-back exhaust finishes things up. The stock over-axle pipe was retained to keep sound at reasonable level. Make no mistake, though: this thing will have plenty of growl.
Next, some much-needed brake work, and a few suspension modifications to allow Justin’s Mustang to hook up better at the strip, and dial in the pinion angle for that one-piece driveshaft. The rear sway bar was also relocated to make room for some massive rear rubber: 15×10″ Forgestars on the rear, with some super-skinny 17×4.5s on the front. Those massively wide rear Forgestars are wrapped by a pair of Mickey Thompson ET Street DOT-approved, bias-ply drag tires.
Finally, a Cervini’s Auto Designs Cobra R hood is fitted to give Justin’s GT a distinctive, aggressive look while remaining on the subtle side.
The Mustang made some pretty impressive numbers on the dyno: 643 horsepower and 560 lb-ft of torque to be exact. We can’t wait to see what this thing will do on the track!
Feeling inspired? Looking to take your Mustang to the next level? Then look no further than American Muscle. They have everything you need to help you build the Mustang of your dreams.
