Dale Amy
April 22, 2014
Photos By: Drew Phillips

Horse Sense

The APR Performance GT-250 angle-adjustable rear wing is targeted at both road racing and drifting.


Wide-bodies are all the rage. Show me a recent SEMA-prepped S197 and odds are it'll be considerably broader-of-beam than when it rolled out of the Flat Rock door. This is hardly a bad thing, since fenders, not unlike shoulders, tend to look better when broad and well filled out. Let's stress that filled-out part, 'cause nothing looks cheesier than flared fenders over scrawny wheels and tires. (Those ghastly '70s shaggin' wagon vans come to mind.)

Kit designers seem to take one of two approaches to widebody styling. One approach gradually and smoothly swells the entire front fender/rear quarter areas, while the other style—as demonstrated by this decidedly racy example from APR Performance—tends to flare mostly just the immediate area above the wheel openings. Either way, the effect is both visually aggressive and practical, creating huge real estate for rolling stock.

APR's widebody aero kit comprises 10 pieces and includes front and rear fascias, matching rocker panels, and those prominent front fenders and rear quarters, each of which is 50mm (about 2 inches) wider than stock. This coupe takes advantage of this newly available wheelwell space with three-piece, 20-inch SSR MS3 rims, 9.5 inches wide at the nose and a full 12.5 inches at the end where the power goes.

And if those Toyo Proxes T1R rear skins look like rubber bands, it's because they have 345 section width with an aspect ratio of only 25 percent. Good thing they have minimal potholes in California, where APR is based, though we doubt this thing will see a whole lot of street time. It prefers the track.

Pumped by ProCharger’s programmable-ratio i-1 centrifugal, the 5.0-liter Coyote is otherwise stock, save for carbon-fiber engine and coil-pack covers from Carbign Craft. The result is 568 hp meeting the ground.

Of course, having all that 345/25R-20 launch traction pretty much justified—or maybe even demanded—a little extra steam underhood. ProCharger took on that assignment with one of its air-to-air intercooled, programmable-ratio i-1 centrifugal kits, finished in purposeful-looking matte black. With the rest of APR's 5.0-liter Coyote being practically dead stock right down to its catalytic converters, the ProCharger i-1 shows its out-of-the-box merit by delivering 568 hp to those fat rear hoops, along with 513 lb-ft of twist.

Installation of the blower, dyno testing, and tuning were handled by Creations & Chrome in Valencia, California, and said tune is of the 91-octane variety, so it's California-friendly. All spiffed up with twin white stripes over Torch Red (by BASF), ProCharger displayed APR's clearly track- oriented coupe at its booth during last November's SEMA show.

The coupe's raciness is personified by that towering adjustable APR GT-250 carbon-fiber rear wing, lending a kind of FIA GT1 World Championship look. This $1,480 wing is definitely not window dressing. It's a serious race piece, adjustable between 0, 5, 10 and 16 degrees angle-of-attack, and capable of generating as much as 380 pounds of downforce at 120 mph, according to APR's computational fluid dynamics analysis.

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The project started with a '12 Mustang GT that then had its front end updated to '13 appearance, with Spyder LED and projector headlights added. Its factory hood now wears APR's pre-preg carbon-fiber vents (note the widened front fenders are gapped at the rear, also for pressure relief). APR's Mustang catalog is fairly extensive, as demonstrated by the coupe's adjustable front splitter, rear diffuser, and sideview mirror housings, all crafted from carbon fiber.

Though the coupe's looks lean more to the track side of the road/track equation, the multi-adjustable Variant 3 coilovers from KW Suspensions can go either way. These are teamed with antiroll bars from ST Suspension (a KW subsidiary), front and rear, while Australia's Whiteline stepped up with rear lower control arms and a Panhard bar to help keep the otherwise stock axle exactly where it should be.

Stopping should be no problem, as up front is an aptly named StopTech Big Brake Kit, with its 15-inch, two-piece rotors clamped by six-piston calipers. StopTech slotted rotors and pads are also fitted out back.

Certainly streetable, but made for competition, are Sparco’s Pro 2000 buckets and suede-wrapped L360 flat-bottom steering wheel. The ProCharger is programmable via the touch screen on the dash.

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Fiberglass-shell Sparco Pro 2000 competition buckets strung with Takata four-point harnesses take center stage in the cabin, matched in raciness by Sparco's L360 flat-bottom, suede-wrapped steering wheel, in a nice manageable 13-inch diameter. Aft of the buckets is APR's carbon-fiber rear-seat-delete panel. The screen in the console is for a Zeitronix wideband engine data-logging system, and the cool Delrin shift knob is called a Hardbar, from Product Innovations.

Though built initially to show off the products of APR and its project partners, the last we saw this coupe, it was ripping around Auto Club Speedway in California with a full head of steam, lap after lap. So it doesn't just look track-worthy.

Tech Specs: 2012 GT

Engine And Drivetrain

Block
Stock Coyote 5.0-liter
Crankshaft
Stock
Rods
Stock
Pistons
Stock
Camshafts
Stock
Power Adder
ProCharger i-1, programmable ratio
Cylinder Heads
Stock
Intake Manifold
Stock
Fuel System
Stock w/ 52-lb/hr injectors
Exhaust
Stock manifolds with MagnaFlow Clamp-On Tru-X pipe and MagnaFlow after-axle exhaust
Transmission
Stock manual w/ ACT T1S-F05 Twin-Disc HD Street kit
Rearend
Stock 8.8-in

Electronics

Engine Management
Stock w/ custom tune
Ignition
Stock
Gauges
Stock w/ ProCharger touchscreen

Chassis and Suspension

Front Suspension
K-member
Stock
A-arms
Stock
Struts
KW Suspension Variant 3 coilover
Springs
KW Suspension Variant 3 coilover
Brakes
StopTech 15-in Big Brake kit w/ six-piston calipers and two-piece rotors
Wheels
SSR Wheels MS3 three-piece, 20x9.5-in (custom offset)
Tires
Toyo Proxes, T1R 275/30R-20
Rear Suspension
Shocks
KW Suspension Variant 3 coilover
Springs
KW Suspension Variant 3 coilover
Control Arms
Whiteline lower arms w/ relocation brackets, Panhard bar, and bar support brace
Brakes
StopTech pads and slotted rotors
Wheels
SSR Wheels MS3 three-piece, 20x12.5-in (custom offset)
Tires
Toyo Proxes T1R 345/25R-20