Quote:
Originally Posted by 1969L88
I recently purchased a 43 original mile 90 ZR1 from the original owner. He changed the oil, oil filter, radiator fluid and air filter once/year. He kept, what he thought, was the original air filter which, came with the car.
Here is the filter...can anyone confirm it is an assembly line item?
Thanks,
Mark
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Date code doesn't appear to be what I might expect on a '90. I believe that I've read that maybe the early '90 - '92 production filters maybe didn't have date codes. I've never seen the
M mentioned in date coding. Customary AC Delco on filter media I thought was for later 90's production. The 6F19 aspect of the date code seems to hint later production. 6 - YEAR, F - MONTH, 19 - DAY & M - UNKNOWN (I've only seen D - DAY and N - NIGHT for shift). I might have expected the
M in later production to have actually ID'd the plant rather than a shift.
There should be some NCRS veterans around that can answer as to authenticity.
Here's a snapshot I snagged of what I would have expected.
A1097C Filter.jpg
Here's a NOS offering from 2016. Better/larger snapshots of product.
https://www.corvetteforum.com/forums...ir-filter.html