Managing director Mike Theaker, 52, founded Daventry-based Red Arch in 2010. It designs and manufactures specialist parts for cars at its Northamptonshire factory, including cylinder heads, badges and engine tuning kits. It is best known for its high-performance exhaust systems, which have features such as a Bluetooth tool to modulate noise. Customers include the Chinese marque Changan and BMW — it made 70% of the exhausts used on BMW’s M-series sports cars. Sales in the year to July hit £14.7m, about 85% of which were generated overseas.
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