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			I heard that the on/off feature was somthing that came in later model years.  I have  PSE on my 2000 S and there is no switch to turn it on or off but, as already mentioned,  there is a hack to make it be on all the time.  
  
Mine works by an automatic vacuum control that opens valves to make the exhaust straight through after ~3500rpm.   Its a real symhpony when open and quiet as a church mouse under light throttle at highway speeds - no drone.  Best of all worlds.
		 
		
		
		
		
		
		
			
				__________________ 
				Rich F 
somewhere 
past: 2000 Boxster S 
past: 2010 Boxster S
			 
		
		
		
		
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