Franken Filter
So.... you get a K&N #33-2700. I got my from Auto Advance, $43.99 - 20%=$35.20 (they're almost always having a 20% off sale online). If you spend $75, free shipping, so I topped off my oil filter collection. Auto Advance has no stores in the great state of Washington, so no sales tax. The filter is pretty much the exact width and 1/2" short.
First I gutted the paper out of the factory filter.
Then sanded the sides down to a height of 1/4".
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I added these wooden 'bridges' that I got at Wally World for a $1.49, they're 1/4" square.
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Trimmed the filter edges to match the opening. I used heavy duty scissors. You'll also have to sand about 1/32" off each of side rails on the gutted frame for the filter to drop in. Don't force the filter in or you'll distort the filter frame.
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I glued the filter to the frame using Loc-tite 2 part plastic super glue.
Sealed everything up with RVT (high temp only because it's black).
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My Autotune is now asking for +9% at 100% throttle at 10k, but needs more road time to get the full picture. It feels stronger.
Notes:
I wouldn't do this with out a Power Commander to add more fuel.
If you're using a O2 sensor (Autotune), make sure all you're glues/sealants are sensor safe