Did the AIS block off today. Went to the auto body shop on base to make my own block off plates and the guy working there wanted to help a little too much so after I marked to aluminum pieces to drill the hole he got involved and wanted to operate the drill press. Maybe it was a safety thing and he had to operate it. Long story short holes were off and the plates were not cut the way I wanted them to be cut. I was not confident in the work so on the way home I stopped and bought (2) 3/8" vacum caps incase the plates didn't work. I didn't really like the way it looked so I just capped off the elbows and reinstalled them. I spent 1.99 on the elbow caps and 1.99 for the small vacum cap (package of 6). I am still looking for something to block off the 1/2 hose coming from the air box. Anyone have any ideas? What happens if I dont block that hose off at all? I am trying to avoid going back to the auto parts store and I am also trying to avoid using a 1/2" bolt. So there it is the $4.00 ghetto AIS block off. Oh yea it cut out almost all of the popping and backfiring.