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Discussion Starter · #1 ·
I bought the pro dry ($50 from autoanything, came quick) and installed. I read somewhere, and cannot locate the post, about taking out the secondary charcoal filter on the 4.0. Should I be doing that and if so, any appreciable advantage? No smog/emissions check here where I live.

Thx
 

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tacoma
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486 Posts
the filter is for smog laws. if you remove it,might be worthwhile to cover the maf and hoses so NO part of the filter or charcoal get in the intake
 

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'12 Ram 1500 HEMI
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removing it was proved absolutely no advantage by gadget on a dyno...just leave it in there...
 
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