After its homologation on 17 September 1960, FIA regulations permitted the use of 'special bodies' and a small number of Sebring Sprites were subsequently fitted with coupé bodywork in aluminium alloy and glassfibre, the most strikingly attractive examples being those devised by well-known race and rally driver John Sprinzel, who had won the 1959 RAC British Rally Championship.
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However, Donald Healey had managed to lure John Sprinzel away from Speedwell by inviting him to set up the Healey Speed Equipment Division and the promise of Healey works drives at both Sebring and Le Mans.
John Sprinzel had founded the highly successful tuning firm Speedwell, where he was joined by future Formula 1 World Champion Graham Hill.