The SR1 was first conceived in 2012 and has acted as an entry point for drivers wishing to race prototype machinery.
It will now undergo an upgrade courtesy of the XXR modifications, which have already been implemented on Radical's SR3 and SR10 models.
The changes include a new aerodynamic design in the form of a central LMP-inspired ‘fin’ and a new engine, the Generation 5 1340cc power unit from Radical’s bespoke engine facility.
Reliability has also been improved, while other areas that have been uprated include external gear position sensors for the gearbox, and a reduction in mass for the connecting rods, crankshaft pins and the ignition system.
James Pinkerton, Radical Motorsport’s head of research and development as well as a double Radical SR1 Cup champion, said: “The SR1 will always be special to me, as I’ve witnessed first-hand how approachable it is for drivers wanting to take the step up in their racing careers.
Source: Autosport