#1
1. Injected Blower		 #2
2. Oval air cleaner		 #3
3. Honeycomb
has ridges on top/screen inside
#4
4. 3-hole or butterflies		 #5
5. Dual Quad or Dominator		 #6
6. High rise dual quad w/cleaners
#7
7. Stacks or Injectors		 #8
8. Bug Catcher, open hole