Amsoil 4510 on the dyno

This is why people need to clean filters more frequently esp. w/ twins! Put on a brand new filter and do that again!
 
I've seen lots of them fold in like that, most guys I know just take them off to run the dyno. Or buy an S&B........
 
I have that same filter, but only one turbo, lol. I bet a cleaner looking filter wouldn't have done that though...
 
I had a new one on my 7.3 when those blue ones came out and sucked it flat also.
 
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