clio sport 172
								
							
						
						
	
						
							
	
						
					
					
						
	
					
				
				hey every one , is it worth upgrade ing the cat and maifold for the 4-2-1 and sport car , and then in so converting froma  172 up to a 182, system , with the aftermatet power flow system with 6x4 ovel on back box.  or is it jsut a wate of money and jsut go for a 172 sports cat, ??