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Standard Equipment

  • Original Style Tube Chassis
  • Independent Front and Rear Suspension             
  • Aluminum Radiator with Electric Fans
  • Rear Transverse Leaf Spring
  • Limited Slip Differential
  • Wilwood 4 Piston Disc Brakes
  • Stainless Steel Fuel Tank
  • Hand Laid Fiberglass Body
  • Clear Headlight Covers
  • Hood Vents
  • Leather Hood Straps
  • Rear Brake Ducts
  • Rear Differential Access Converted to Trunk
  • Primered Steel Side Pipes
  • Original Style Steering Wheel
  • Corvette Grand Sport Dash and Gauges
  • Power Steering
  • Carpeted Flooring
  • Hard Dash and Door Panels and Race Seats
  • Blue or Black Leather and Carpets


  • Twin Stripes

  • RoundelsBlack-Out Package

  • Double Clear Coat

  • Custom Color Paint

  • Set of Painted White

  • Headight Covers

  • Rear Tail Circular Cut-Outs and Fender Slots

  • Functional Diff Oil Cooler

  • Non-Functional Diff Oil Cooler

  • Silver Ceramic Coated Side Pipes

  • Burnished S/S Side Pipes

  • Fuel Pump Fitted into Fuel Tank

  • Touring Interior

  • Push Button Start

  • Diamond Stitched Interior

  • Power Windows

  • Air Conditioning

  • Right Hand Drive Option

  • Custom Piping on Seats

  • Sound Deadening and Heat Dissipation

  • 15" Halibrand Style Aluminum Wheels

  • 17" Front 18" Halibrand Style Wheels

  • 15" Magnesium Grand Sport WheelsCustom

  • Painted Aluminum Wheel Centers


The original Grand Sports are in private collections, and are extremely valuable and highly coveted - not because of what they accomplished, but because of what might have been. Now, you too, can share the Grand Sport experience. Superformance and Duntov Motor Company have painstakingly reproduced the chassis, body panels and accessories required to replicate this extraordinary car. You can own a Corvette Grand Sport by Superformance, a spectacular dream car that is being offered as a complete TKM (turn key minus) unit ready to accept your choice of GMPP engines and transmissions. They are as close to the original as is technically possible. Many may wish what might have been, but you have an opportunity to experience what actually is!


The Corvette Grand Sport originally raced with several different engines and Borg Warner T-10 4 speed Manual transmissions. In its racing debut early in 1963, the car sported a production 360 HP, 327 CID fuel injected motor and a “stock” appearance. The most serious factory engine was a 377 cubic inch displacement, all-aluminum smallblock with four Weber sidedraft carburetors, rated 550 hp (410 kW) at 6400 rpm. Superformance has built our chassis in such a way to allow the engines and transmissions of the past or to accomodate any of the newer LS-series or E-Rod series of engines and transmissions from GM Performance Parts.


In 1962, with the blessing of Chevrolet’s top management, Zora Arkus-Duntov initiated a program to create a competitive road racer based on the newly designed Corvette C-2 Stingray. Duntov’s objective was to suddenly and surprisingly unleash on the international road racing community 125 very fast, high horsepower, great handling race cars, all based on a street capable production car footprint. Although the Grand Sport Cars eventually qualified as GT production cars under international racing rules, GM executives learned of Duntov’s plan to make these cars available to independent road racers that could race without the official GM endorsement, and officially stopped the program. Only five of these Corvettes had been completed and Duntov was ordered to destroy them. Miraculously, each of the prototypes escaped destruction orders, falling into the hands of private racers who preserved their heritage for future generations.

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Harry Williams

Client Review

This is your Testimonial quote. Give your customers the stage to tell the world how great you are!

Robert Harris

Client Review

This is your Testimonial quote. Give your customers the stage to tell the world how great you are!

Vinny Giglio

I've been dealing with Dan for the past 2+ years.  I immediately fell in love with his passion for Superformance cars and cars in general, and his ability to think outside of the box with his builds.  I've purchased 6 cars from Dan to date, both used and new and have 3 more cars on order.  I love having a conversation with Dan and the excitement about the future build and I can always rely on him to have great input on color combos, what engine to use, etc.  He actually listens to what I'm trying to accomplish with a build, somehow completely understands and feels that vision alongside me, and then makes suggestions that I would have never thought of that end up making the car something I could have only dreamed of.  Its the small details that matter, and the ownership experience of the Superformance brand is nothing short of amazing, and Dan truly helps bring the experience to the next level!  I currently own a Grigio Silverstone GT40 Mki and a 1st gen Daytona Coupe in Guardsman Blue and White, and also have a Cobra MkiiiR, a GT40 mkii and Daytona Coupe on order.  I'm very thankful for Dan and his knowledge and have enjoyed becoming friends over the years as well! 


Bob Spencer

It is very rare that I would take the time to write a review, but in this case I am compelled overwhelmingly to share my experience of purchasing my Superformance FIA Cobra.


After decades of contemplating building a replica Cobra, I decided to instead purchase a Superformance Cobra. The main reason is, I felt that to obtain the high quality fit and finish of the Superformance, I would be spending very close to the same dollars to get the same quality and I would have to do the work of assembling the car, wiring, sourcing parts and building the engine.


As luck would have it, there were several NEW Superformance FIA Cobras on the market in the fall of 2020. After contacting several dealers, I booked a trip to South Carolina with my 12 year old son to visit Downforce Motorsports. Probably the main reason, I decided on Downforce was because the Owner, Dan Long, had questioned me on the purpose for the car. Ie was it going to a street car or what? My answer to Dan was the car will be MOSTLY track and some street. Dan then reviewed with me the options he felt were appropriate for a track car vs a street car AND WHY. The knowledge Dan communicated to me on the differences between a street car vs track car made my decision to work the Dan easy. He gets it. He understands, there are big differences.


While meeting with Dan and his wife Anna in South Carolina, it was clear my son and I were dealing with truly wonderful, knowledgeable people. During that meeting in Dec 2020 we bought the car, and that was just the start of the continued customer service. Dan had arranged for me to meet with Prestige Motors for the engine build and Olthoff Racing for engine install and suspension set up. By April of 2021, I was testing the car at Virginia International Raceway with my son cheering me on. After spending a few months getting used to the power/weight ratio, we changed the alignment for aggressive track use. I have competed in 3 events that included autocross and roadcoarses in 2022 and have won my class at each event. Dan Long has kept in touch during my Cobra adventures and is always helpful when I need advice or resources.


If anyone is interested in purchasing a Cobra, Daytona Coupe, or GT40, I would highly recommend contacting Downforce Motorsports about Superformance.

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