The first Riley Specials appeared in the 1920's, and by the 1930's there were a number of, now famous, people creating racing cars, or rally cars from Rileys.
Freddie Dixon
One of the most prolific was Freddie Dixon, after a long career on Motorbikes he transferred to cars, and immediately found success with Riley based racers.
John Treen
Another well-known special builder was John Treen, who adapted several Brooklands, as well as other models. There is now a CD ROM available giving a large amount of information on the Cars.
Duncan Ricketts
Although possibly better known for racing ERAs, Duncan Ricketts also built 2 Riley Specials. The newer one was built in the 1980's, and has been refined by it's current owner Clive Temple.