1+ Air switching valve  
2+ Hose  
3+ Hose clip  
4+ Air pipe  
5+ Stub pipe hose  
6+ Breather hose  
7+ Delay valve  
8+ Thermal vacuum valve  
9+ Throttle control valve  
10+ Clip  
11+ Screw  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.