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C6 Corvette owners wanting to seriously upgrade have quite a few choices. Companies like Lingenfelter, Callaway, and Pratt & Miller can turn the C6 into a vehicle capable of taking on the world's best supercars. Not to be left out, Detroit-based Specter Werkes/Sports launched its GTR package for the C6 Corvette last week that features an extensive carbon fiber widebody kit, heat extractor hood, Stoptech brakes, Forgeline or HRE wheels, Corsa exhaust system and more. The customer of the first C6 GTR also opted for Specter's Matrix II engine package that includes a stroker engine increasing displacement from 6.2L to 6.8L and boosting horsepower to 545 bhp and torque to 530 lb-ft. More details on Specter's GTR package and this particular car's features can be found after the jump.

[Source: Specter Werkes/Sports via Jalopnik]


Specter Werkes/Sports unveiled the first C6 Corvette GTR at Cauley Ferrari, in West Bloomfield, Mich. Wearing signature wide bodywork, suspension upgrades and equipped with a Matrix II LS3 V-8 rated at 535 emissions-legal horsepower, it was built for Rollie Purifoy, of Purifoy Chevrolet, in Fort Lupton, Colo.

The all-new, C6-based Corvette GTR retains the intrinsic character of the Corvette, augmenting it with appearance, performance and luxury enhancements. It is a distinctive and exclusive sports car with exceptional capability, whether on the street or track.

The GTR package is available on all C6 Corvette models, including the base coupe and convertible, the Z06 and ZR1. Orders are being accepted immediately, with product and ordering information available at www.spectergtr.com or 248-583-9559.

"We are very proud to launch the C6 Corvette GTR with Rollie Purifoy, from Purifoy Chevrolet, and Jeff Cauley, from Cauley Chevrolet and Cauley Ferrari," said Jeff Nowicki, Specter Werkes/Sports founder. "The new GTR offers enthusiasts everything they're looking for in a sports car – performance, great looks and guaranteed exclusivity."

The GTR's expressive, widened bodywork is complemented with the use of exposed carbon fiber details. Standard and optional GTR features include:
• Unique GTR bodywork, including: front fascia, carbon fiber splitter, extractor hood, front fenders, doors, rocker panels, rear fenders, rear fascia, carbon fiber rear diffuser, carbon fiber mirror caps, Cleartastic paint protection, paint and assembly
• Custom GTR headlamp bezels with exposed carbon fiber appearance
• Unique tail lamps and center high-mounted stop lamp
• Michelin Pilot Sport 2 Zero Press tires; 285/30ZR19 (front) and 335/25ZR20 (rear)
• Forgeline or HRE wheels; 19-inch in the front and 20-inch in the rear
• StopTech ST60 front brakes and ST40 rear brakes
• Carbon fiber fuel rail covers and carbon fiber, low-restriction air box
• Hotchkis stablilizer bar kit
• GTR-embroidered seats and serial-numbered dash plaque
• CORSA/Specter stainless steel performance exhaust system
• GTR badges

The Corvette GTR package carries a base price of $34,995, with a variety of high-performance powertrain options available for additional cost. Custom paint treatment is also available. Each vehicle is hand-built, numbered and fully documented for the customer.

Distinctive design

Styling that accents the Corvette's design is a hallmark of Specter Werkes/Sports and the C6 GTR takes that philosophy to the next level, with a completely redesigned body. Like the original C5 GTR, the C6 version is based on widened bodywork that supports the larger wheel/tire combination. It also gives the car a more aggressive stance – as do the racing-inspired front and rear fascias.

"The GTR's design sharpens and embellishes many of the Corvette's design cues, but doesn't eliminate them," said Nowicki. "It is a design that respects and celebrates the Corvette's design heritage, but builds on it to suit the interest of our customers – enthusiasts who are looking for a unique and exclusive product."

At 77 inches, the GTR's bodywork is 4.5 inches wider at the rear fenders (2.25 inches per side) than a regular-production C6 Corvette and 1 inch wider than the Corvette Z06. The physical difference may seem small, but the overall effect, along with a slightly longer overall body length, creates a unique proportion to the GTR that is aggressive and suggests speed even when stationary.

Specter Werkes/Sports replaces the front and rear fenders; front and rear fascias; doors, rocker panels and hood – everything except the roof panel and rear hatch – with special, hand-formed GTR panels. Each car is completely repainted and re-assembled with the new bodywork at Specter Werke's Troy, Mich. facility.

GTR standard equipment also includes a number of exposed carbon fiber details, including:
• Front splitter
• Rear diffuser
• Outside mirror caps
• Headlamp surrounds

A bold, LED-lit rear center-mounted stop lamp is integrated in the rear fascia. It was originally designed for the Cadillac CTS, and gives the GTR an unmistakable rear appearance.

GTR #1 details

C6 Corvette GTR #1 is powered by Specter's emissions-legal Matrix II engine package for the LS3 engine. It is a "stroker" engine package that boosts displacement from 376 cubic inches (6.2L) to 416 cubic inches (6.8L). That is achieved with a Callies 4340-forged crankshaft that delivers a 4.00-inch stroke. Forged rods from Manley and forged pistons from Mahle round out the rotating assembly.

The camshaft is a special grind from Comp Cams and the LS3 heads' combustion chambers were enlarged from 71cc to 72cc in order to maintain an 11:1 compression ratio. With stainless steel long tube headers and a low-restriction air intake, the engine is rated at 535 horsepower and 530 lb-ft of torque. The engine also features carbon fiber fuel rail covers and a yellow-painted intake manifold.

The Matrix II LS3 channels power to the pavement via HRE wheels, measuring 19 x 11 inches in the front and 20 x 12 inches in the rear. They wrapped with Michelin Pilot Sport 2 Zero Press tires (285/30ZR19, front, and 335/25ZR20, rear). Behind the wheels are StopTech brakes, featuring ST60 six-piston calipers and 15-inch slotted rotors in the front and ST40 four-piston calipers and 14-inch slotted rotors in the rear. The calipers' yellow color contrasts with the HRE wheels' black center sections. The GTR also features Hotchkis adjustable stabilizer bars.

On the outside, C6 GTR #1 is painted a gorgeous BASF liquid silver color, the richness of which appears wet to the touch. It is a premium color choice and represents the nearly unlimited paint options available to customers. Inside, GTR-standard embroidered seats and Spinneybeck leather trim details contrast elegantly with the Corvette's black interior. A Specter Werkes/Sports production plaque is mounted on the center console.

GTR legacy

The Specter Werkes/Sports GTR was first launched a decade ago and saw the creation of nearly 30 specialized cars that were delivered across the country – including the two most notable GTRs, which were created for Dale Earnhardt Sr. and Jr., in 2001.

Specter Werkes/Sports is an automotive prototype and fabrication facility based in Troy, Mich. It specializes in race-proven engine performance enhancements and creating specialty accessories for C5 and C6 Corvettes, the Cadillac CTS and more. The company's flagship project is the Corvette GTR.

Since its founding in 1990, Specter Werkes/Sports has been recognized internationally for unparalleled achievements of excellence, helping automotive industry leaders design, model, and prototype innovative, top-of-the-line products at competitive pricing.

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    • 1 Second Ago
      • 6 Years Ago
      Isn't GTR in car use strictly copyrighted by Nissan?
        • 6 Years Ago
        What about the Ford Mustang GT-R concept? There's also the Iconic GTR. There's McLaren F1 GTR, Ultima GTR, and even a Holden Torana GTR XU1 made in the 70's. Like the other guy said, GTR isn't copyrighted.

        • 6 Years Ago
        This S/E Michican based company has produced body kits for C4, C5, & current Corvettes. They have used "GTR" name before & have promoted it on their Grand Am (Daytona 24) or SWC racing Vettes.

        This GTR was debuted last week @ Cauley Chevy/ Ferrari dealershipin West Bloomfield, MI
        • 6 Years Ago
        Uh, no. It's an Acronym for Gran Turismo-R (usually Race, take your pick), but that is not copyrighted by anyone. Or it sure as hell shouldn't be. GT-R? Maybe. But they can't own GTR. It's a widely used term, particularly for race car versions of road cars.
        • 6 Years Ago
        To the Batcave!
        • 6 Years Ago
        The discussion shouldn't be about copyright, but rather trademark. Just an FYI.
      • 6 Years Ago
      I love corvettes, but this is one ugly mother.
      The nose is pure rice, belongs more on a honda civic.
      The hood is too busy.
      And the side ground effects look like someone slapped them on there from another car.

      I'd take the standard z06 any day over this car.
      Sometimes, less is more.
        • 6 Years Ago
        How the f*ck does a CHEVY V8 sound "rice"??? If you mix up the exhaust note of a small block (or any size) Chevy with a 4-banger Honda VTEC you are deaf.
        • 6 Years Ago
        Get your reading glasses out, i said "NOSE", not "NOISE".
        How the hell would i know what it sounds like, anyway?
        • 6 Years Ago
        His post says "nose", not "noise".
      • 6 Years Ago
      Silly me, and I thought it was impossible to ruin the simple beauty of a Corvette.

      That thing needs a Fast and Furious cameo, its where all good cars go to die.
      • 6 Years Ago
      That hood looks like something from Corvette Summer.
      As to the rest of it, its pretty nice. Looks like a sweet ride.
      • 6 Years Ago
      This thing kinda has that sheath stuff going on at the back that the Viper Competition Coupe had. Not real jacked on that.
      • 6 Years Ago
      In my opinion there has yet to be a good looking Corvette since the C3, and unfortunately everything else about that car was all wrong. Mechanically Corvettes are getting much better, but looks wise, they're just awful.
        • 6 Years Ago
        My favorite Vette is still a '63 Split Window Coupe. It's just so mean looking.
      • 6 Years Ago
      GTR strictly a Nissan copyright?...What the hell? Do you know ANYTHING about cars? The was the most unbelieveable question I've ever heard...well read.
      • 6 Years Ago
      A bit too shiny and gaudy for me, but should be seriously fast, and LOUD, too, should be painted in flat/matte black like the best of tuning jobs (Novitec TuNero and Brabus Bullit Black Arrow come to mind)
      • 6 Years Ago
      That's about the most evil looking Corvette I've ever seen. Not very pretty... but bad-ass machinery rarely is. I know 545hp is a stout figure, but with all the uber 'Vettes out there, (and with this thing looking like it wants to steal my lunch money) I thought it would pack a bigger punch.
      • 6 Years Ago
      Uh-oh. They included "GTR" in the package name.

      *puts up anti-fanboy shield*
      • 6 Years Ago
      Caption: If you can't beat em, join em.
      • 6 Years Ago
      Horrendous. That thing makes the stock Corvette C6 look pretty.
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