Complex sentence: In 1948 Chambers was 4th at Chimay, and HRG won the team prize in the Spa 24 hour race, where team leader Peter Clark had the cars equipped with two-way radios for communication between the drivers and the pits.
Split into simpler sentences: In 1948 Chambers was 4th at Chimay and the team won the team prize in the Spa 24 hour race. Team leader Peter Clark had the Spa cars equipped with two-way radios for communication between drivers and the pits.