The MKII Slab Side is a sanctioned continuation of the original Shelby Cobra 289 that first appeared in 1962. The power from a 289 is considered a sweet spot and very useable. This authentic design is a proven race winner and demands respect. Loyal to the original lines and proper nostalgic characteristics of the 1962 American race winning Cobra FIA, this car is a perfect mate for heart-racing 289 motor and a more modern Tremec TKO transmission. A gentelmen's car pure in every detail without screaming track car, but sounding and handling like one.
Unlike most competitors, the MKII Slab Side is built on the successful Tojeiro-styled round tube chassis and features an authentic transverse leaf spring suspension to give owners an exceptionally authentic driving experience. Through our exclusive agreement with Carroll Shelby, the MKII Slab Side is the latest licensed Shelby product in the Superformance lineup.
The Chassis is the original John Tojero designed 3” tubular rail ladder with cross-member. This chassis is reproduced using drawings obtained from AC cars and also implements the necessary changes to utilize rack and pinion steering . The 3” tubes are tig and mig welded to guarantee a safer and stronger chassis. This is much stronger than the arc and gas welded originals. Pain staking efforts were made to reproduce the chassis as close to an original as possible while incorporating a few modern improvements, like inserting a 3" square tube through the main rails to prevent flexing. Building the cars with a meticulous eye on authenticity took time, but this resulted in a superior driving experience.
The Superformance MKII roadster bodywork replicates the later of the 289`s which incorporated modifications to fender flares that will accommodate the slightly wider tires fitted onto chrome wire wheels. One of the improvements made by Hi tech was that the footwells were tweaked so that the taller North Americans can now sit comfortably.
To compliment an original chassis you need to follow the same rules when it comes to the suspension. It had to be period correct, or as close as possible. The original slab side had a transverse leaf spring style suspension which requires different length springs to change camber settings we decided to use heim joints which were used on some of the original competition cars.
Another change with regards to safety was to add an additional pick-up point to the chassis to increase the shear strength of the bolt passing through the lower control arm rose joint or poly-bushed rod end. The original springs were made of thinner steel than that available today. In an effort to keep compression rate the same, this car comes with one blade less and “free camber” was changed to keep the ride heights equal from front to rear. This insistence on authenticity means that owners of a Superformance MKII Roadster will have virtually the same driving experience as the original.
An Original would have probably been a 289 with a B.W T10. Today, the recommendation would be a 289/302 based engine with a more modern Tremec TKO or similar transmission.
Again, attention to small details like the replication of the glove box knob and the correct use of gauges make this car stand out from the others. A side screen pocket is fitted behind the seats on the rear bulkhead and door map pockets are also incorporated in the doors. Lush carpeting finishes off the cabin for a comfortable feel on the road.
All Superformance products are supplied complete, but without engines and transmissions. The selection, purchase and installation of the drive train are the responsibility of the purchaser.