The Proton Impian (UK name for the Waja) was entered in the British Touring Car Championship from 2002 to 2004 by Team Petronas Syntium Proton and scored 2 wins in 95 races.
After the BTCC campaign, the car was entered...
The prototype would be the basis for the Proton Chancellor which was engineered and stamped as a long-wheelbase variant of the Waja in 2005.
https://www.motaauto.com/the-rare-extra-long-proton-perdana-limousine/
