8.1 Vortec Airfilter

[J. Ingram]

I recently purchased a f2004 Winnebago Sightseer 35N with an 8.1 Vortec engine. When I attempted to change the air filter it was wrapped in a sponge like material. What is the purpose of this and is it necessary?????

[Clay L]

I suppose it's a sort of pre-filter. Mine had one too. The new one that I got from NAPA also has it.

I suspect Delco thought it was needed or they would not have speced it. They don't spend any more money than necessary.

[J. Ingram]

Thank you. It seems this would choke the engine. Did you install it also?

[gbs2320]

Yes it is important to install the sponge like prefilter. Here is some info also check out his fuel filter adapter to save yourself some $. Call Toll Free To Order 1-877-549-9696 Greg

[DAN L]

Originally Posted by J. Ingram

I recently purchased a f2004 Winnebago Sightseer 35N with an 8.1 Vortec engine. When I attempted to change the air filter it was wrapped in a sponge like material. What is the purpose of this and is it necessary?????

i use a k&n oiled gauze filter pn#33-2062-1 with no prefilter. the next one i buy will be an s&b oiled gauze filter pn#66-2014D because it is thicker for better filtration. they both flow air better and last longer than paper filters.

[paz]

There is an AC Delco filter available without the foam prefilter to fit the 8.1. It is part number A917C.