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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Aug 2000 Posts: 197 Member | | Member Joined: Aug 2000 Posts: 197 | You can get off the shelf spin-on bypass filters from NAPA. I would think that they have the orifice built in. That said, I have used a standard spin on filter assembly without a dedicated restrictor orifice. The small oil lines restrict the flow enough that there is no noticeable affect on oil pressure.
Jason
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