Built to GT1 regulations, one chassis was completed and raced in both the 1999 British GT Championship and the 1999 American Le Mans Series.

Led by Richard Austin, the owner of Evesham Micros, the S99 was developed as an independent successor to the Harrier LR9C platform of cars that competed in British GT from 1994 to 1998.

[1] Under the guidance of lead designer Phil Bourne, the S99 stretched the limits of GT1 regulations through the use of a Formula 1-derived Judd GV4 V10 engine and a carbon fiber chassis manufactured by Lola.

[2] In the hands of drivers Richard Dean and Kurt Luby, the S99 achieved a podium finish in every British GT race that it completed, including one win at Silverstone.

[4] The car made its public debut at the Yokohama World Time Attack Challenge 2024 in the Pro Class, finishing second overall with driver Josh Buchan.