Don't know exactly how the air intake is on your engine but I used the Baldwin PA2832 along with a manometer/air flow gauge on my W115's equipped with OM615's and OM616's. Pretty dusty conditions here in AZ. Never reached 10% restriction in over 30K miles driven.

https://www.baldwinfiltersrus.com/baldwin-pa2832-replacement-for-ecolite-air-element-in-disposable-housing.html

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