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Old 11-12-2018, 02:22 PM   #569
jaykay
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Join Date: Sep 2009
Location: toronto
Posts: 2,668
IIRC you need the stock AOS in place to maintain crank case pressure as it should be.......and that the low tension piston ring design design is quite sensitive to changes in crank case pressures.

Perhaps one of our engine specialists can confirm this....
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