When I first Put in the BHAF I read a post about Not clamping the turbo Hose clamp to tight as it would distort the filter and suck unfiltered air. One suggestion was to use pvc or a abs plastic sleeve inside the mouth of the filter. I used a 3" abs coupler cut in half (4" outside diameter) The wall thickness is 3/16 thick. The added restriction bothered me. After I added 275's and an EZ it bothered me more. I went by the muffler shop that put on my 4" exhaust and had them cut me a couple stainless
(1-1/2" x 4" x 1/16") sleeves
Finished them up a bit on the grinder and... .
It works great with a wall thickness of only 1/16"
#ad
#ad
(1-1/2" x 4" x 1/16") sleeves

It works great with a wall thickness of only 1/16"


Last edited by a moderator: