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		 ah what a question. Either NA (esp. vtec motors) or turbo'd engines. VTEC for the 5700 rpm kick in the pants (and sound), and turbo's for the spool (and sound as well). 
 
I'd say i got turned onto turbos when my buddy had his WRX and i was driving it every weekend. It was intoxicating. The power delivery and refinement was unreal. 
		
	
		
		
		
		
			
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