Uncle Tony explains how an oil filter works. Of special interest is the bypass valve and how it allows oil to be unfiltered while an engine is under load. The Ugly Truth About Your Engines Oil Filter - It Will Let You Down When You Really Need It The Most - YouTube SRT Oil Filter | Dodge Challenger Forum
Found a pretty good deal on SRT filters for my 6.4. https://www.dieselfiltersonline.com/parts-search/05038041aa-srt-engine-oil-filter-mo041.html
What did they charge you for shipping? I heard that the costs are high and it's not worth it if you are only buying a filter or two. Steve White Motors is selling it for $20.70 if you buy three, with free shipping. Challenger Charger 300 SRT SRT8 Mopar Performance Oil Filter 5.7L 6.1L 6.4L 8.4L | eBay
They charged $10 and change, I got 3, so still ahead... As much as I hate Gargle (Google) I always use Gargle shopping to find the best price on the web.
