Originally Posted by Chargerfan68
The strange thing we noticed, when comparing the Wix 51515 to the Wix racing 51515R filter at the dyno ; the racing filter actually had Slightly SMALLER openingson the filter base plate. That did not make sense to us nor the dyno/shop owner.

Anyone have a clue as to why that would be?


RE: higher burst pressure required a stronger base plate, easier to stamp smaller holes than make that part out of thicker metal shruggy

440, 4-Speed, 3.54
1968, when Dinosaurs ruled the Earth