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Since I once was a tool and pattern maker, I tried to think like a German Engineer, and came up with this; the grooves are for installing and adjusting the nozzles. Just a guess.
My car had three of them missing when I got it. I was just going to make some plugs for the holes, since I never use the headlight washers. I once tried the washers to see if they worked, and all it does is make a soapy mess all over the fenders. If I drove in bad weather, they might come in handy, but I never drive the Boxster in that kind of weather so I could care less if they worked at all.
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2000S Ocean Blue Metallic- 116K
3X Water Pump, Clear side markers, Crios Mod, Front engine mount, Flywheel, clutch, RMS, AOS, MAF, serpentine belt, power brake vacuum line, battery, 2X CV boots, Fuel filter, Oil filler tube, 3X ignition switch, 90K service, gas cap, Coolant tank
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Threaded Mode
