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If you purchase the Arlen Ness air cleaner cover and have a late model bike running a 50mm throttle body you'll need to run a shim to move the cover out a bit, the new model Big Sucker designed for the larger throttle body has a slightly wider spread between the backing plate mounting bolts and if you don't shim it out the cover will hit the bolts.
In addition you'll need to apply some pieces of peel and stick dense foam an inch thick or so to either the filter or the cover to prevent it from resonating.
I thought I was done with mine too. BUT once you stand back and look, you just cant leave it alone!! There are ALOT of other things to do. I gotta lotta stuff on my bike but i'm no where close to DONE yet.
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