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Just wanted to note for those new to the spin-on oil filter mod that while the NAPA 1042 does have an anti-drainback valve, it does not have a bypass valve. Not sure about the 1081.
In conjunction with two filter mags I never run a 1042 for more than 3,000 street miles and change it before any track event due to the lack of a bypass valve.
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Rgds, Fred
#317 550 Spyder Anniversary Edition 2004 Boxster S, 3.8L Flat Six Innovations engine, PSS9s, etc, etc . . .
The contents of my posts are for entertainment only. As confirmed by my many motor sports fails, I am not qualified to give product endorsements or mechanical advice 
Last edited by Oldcarguy; 02-11-2019 at 03:52 AM.
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