engine pre-filter

I don't use one, change my filter regularly.

Do NOT oil it. It is not meant to be oiled.

If you use a K&N oiled filter be very cautious when applying oil. What happens is the oil gets sucked into the MAF sensor, which is right behind the filter, and causes P0151 and P0131 problems.

Pre filter is not necessary if you change the paper filter often.

With all of these coaches out there, I thought someone might have the brand and part numbers for this pre-filter.

The one I have is damaged and will need replacement. Guess if noone knows this info, I'll have to try a Chevy or Workhouse dealer.

A lot of the foam filters are meant to be cleaned, re-oiled and used again. It's a bit messy (don't do it in the kitchen sink) but go to any auto shop and get a two can set to "recharge" it. One can will be the cleaner to wash the old oil, bugs and junk out of it and the other can will be to re-oil the filter and then reinstall it. K&N and others make the two can set.

Bill

It's a Chevy 8.1L engine...Any GM dealer/Workhorse dealer should be able to look it up for you..Take a picture of it and show it to w GM dealer....along with your chassis VIN...that ought to do it.