Complex sentence: Exhaust tailpipes raised after dispute regarding off-blown diffuser in 2011 British Grand Prix, reactive ride systems and "exotic" engine maps banned;, car must be cleared from all crash tests before pre-season testing.
Split into simpler sentences: Exhaust tailpipes raised after dispute regarding off-blown diffuser at the 2011 British Grand Prix. Cars must be cleared from all crash tests before pre-season testing.