Jeremy George Weston "Jem" Marsh (15 April 1930 – 2 March 2015) was a British engineer, motor manufacturer and race driver, born in Clifton, Bristol, England. He entered the motor industry through his company Speedex Castings and Accessories Ltd., based in Luton, that manufactured and sold tuning parts for Austin Sevens, based on Marsh's successful Speedex750 racing special.
Jeremy George Weston "Jem" Marsh (15 April 1930 – 2 March 2015) was a British engineer, motor manufacturer and race driver from Clifton, Bristol, England. He entered the motor industry through his company Speedex Castings and Accessories Ltd., based in Luton, which manufactured and sold tuning parts for Austin Sevens, inspired by Marsh's successful Speedex750 racing car.