 In 2001 the Phase 2 F4R received electronic throttle control.In 2004, the Phase 3 version of the Clio 2 RS gained for a total of using 4-2-1 exhaust headers, changes to the intake manifold and exhaust system (the new twin rear mufflers requiring the removal of the spare wheel well in the boot).Power increased further in 2006 for the Clio 3 RS, now with , using further improvements to intake and exhaust, notably continuously variable valve timing on the intake cam.