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> Air filter adapter for '73 1.7, Makes new filters work
BillC
post Feb 19 2017, 03:29 PM
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I have a '73 1.7 liter 914 that has been running a stock air filter element for far longer than I've owned the car. I've been looking for a while to find a replacement air filter that would just drop in, but nobody seems to make them any more (I've searched on this board, and the questions go back a looong time).

However, it turns out that a NAPA Gold 2011 will work, if you make an adapter. Since I finally had a little spare time this weekend, it was time to make one. It's fairly simple: A piece of 16ga aluminum, with an inner hole to match the stock filter and an outer diameter to match the new filter. Around the outside perimeter, I added 4 small tabs, bent up to keep the new filter in place. I also put a ring of 1/16" thick weather stripping around the underside of inside perimeter, to seal the adapter against the bottom of the air filter housing. Here are a few pics:

Here are the air filters, new on the left and original on the right.
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Here's the adapter next to new filter.
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Here's the new filter and adapter installed in the air filter housing.
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With the adapter, the new filter fits in very nicely into the air filter housing. Now I'll be able to keep my car in clean, new air filters for a long time.
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913B
post Feb 19 2017, 05:00 PM
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Thats pretty cool. I will have to remember that next time I find a piece of aluminmum.
Great Job !
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boxsterfan
post Feb 19 2017, 05:22 PM
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Super cool!! Way cheaper than ripping the motor out and stuffing in a /6!! (IMG:style_emoticons/default/smile.gif)
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doug_b_928
post Feb 20 2017, 02:14 PM
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Nicely done.
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stinkindiesel
post Feb 20 2017, 04:18 PM
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The adapter is a nice solution.

I'm running a Wix 42110 with an internal dimension of 127mm, 76mm tall. This is very close to the OEM filter, though the OEM has a larger outer dimension. I had thought at first I might need to cut a gasket to make the Wix a little taller in order to seal well, but found I didn't need it.

I think the NAPA 2110 is the same.

Gary
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JawjaPorsche
post Feb 23 2017, 06:23 AM
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Awesome! Made one yesterday from some aluminum flashing I still had left when I build my house. Thank you so much for the tip.
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