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1989-2004 Kawasaki KX500 Billet Air Filter Sealing Kit (1989-2004)

Sale price $175.00

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Air Filter Cage & Bolt
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KX500 Billet Air Filter Sealing Kit (1989-2004)

STOP FEEDING YOUR ENGINE DIRT.

The 1989–2004 KX500 is a legendary powerhouse, but it has a documented "Achilles' heel": the flimsy, plastic OEM airbox interface. Over time, the stock plastic cage and airboot mating surface warp and distort. This creates gaps that allow fine dust and debris to bypass your filter, acting like sandpaper on your cylinder walls and bottom end!

Our Two-Piece Billet Air Filter Base Assembly is the definitive "fix-it-once" solution. Precision CNC-machined from 6061-T6 aluminum, this kit replaces the weak factory components with a rigid, perfectly flat mating surface that ensures a 100% airtight seal. Compatible with the oem air filter cage and bolt but our new ones can be added on as an option if yours are damaged or missing.

Why Your KX500 Needs This:

  • Engine Life Insurance: Prevents catastrophic engine failure by sealing the primary entry point for dirt and sand.

  • Eliminates Warpage: Unlike the stock plastic that flexes under heat and pressure, our billet plates stay dead-flat forever.

  • Total Protection: Protect the investment of your high dollar build


Product Details:

  • Material: CNC Machined 6061-T6 Billet Aluminum.

  • Fitment: Kawasaki KX500 (1989–2004).

  • Design: Two-piece assembly (Inner and Outer sealing rings).

  • Hardware: Includes a full set of Stainless Steel mounting bolt.

"A solid, positive sealing intake flange that gives your 500cc beast the fighting chance it deserves."


KIT CONTAINS:

  • (1) Billet air filter base

  • (1) Billet Outer Sealing Ring

  • Stainless Steel Mounting Hardware Kit

  • optional air filter cage and screw

Compatibility

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Year Make Model

Customer Reviews

Overall rating: 4.9 / 5 from 56 reviews.

Customer photo review of 2017-2025 Honda CRF450r/CRF250r Billet Gas Cap

Unfortunately, the gas cap got scratched during shipping, but after a few friendly emails, the problem was resolved perfectly for both sides. Friendly service, quick solutions, absolutely reliable Top-notch shop👍

2017-2025 Honda CRF450r/CRF250r Billet Gas Cap

Customer photo review of 1988-2004 KX500 Billet Engine Cases

Amazing!!! Luke is so helpful. These cases are amazing and a direct fit of my old cases. All parts are equally made and not one is below my standards

1988-2004 KX500 Billet Engine Cases

The best machined pieces I have ever seen. I have wanted a two piece KX500 billet side cover for a long time and can't wait to install it. So trick!

1986-2004 KX500 Two-Piece Billet Side Cover

Very quick shipping, and super pleased with the quality of this stator cover! The anodized black blends nicely with the satin black powder coat on my KX500 engine.

1983+ KX500 Billet Stator Cover- Kawasaki Logo

Quality parts!!! Very happy with what I received for the money!! Fit and finish is top tier. Also happy to support a company who is helping keep these two strokes alive! I will be back for more parts soon!

Billet Rear Silencer Bracket | KX500 & KX250

Bearings were a perfect fit. A couple of shaft bearings were on back order, which I reicieved shortly after a majority of my orders arrived. Quality of everything is immaculate I would certainly do business with Luke again. I honestly wish I could have purchased the billet cases for my kx500af build after seeing the precision on the covers and head. Highly recommend TSO

1986-2004 Kawasaki KX500 Complete Engine Bearing Kit

I ordered the case saver for my 98 kx250, the price of the TSO case saver was very close to the same as the original kawasaki one. The difference is huge, The TSO case saver is made of stainless steel for extra strength and great looks. Shipping and customer service was very fast and included mounting hardware. First time I ordered from TSO, but it won't be my last. Thanks TSO for offering a quality part and great customer service!

1992–2004 KX250 Case Saver| 316 Stainless Steel

So the cylinder head is immaculate and performs perfectly with the decompression valve. Much much easier to start this 500cc 2 stroke. I just wish I the decompression valve was coming off the side instead of straight out the top. Decompression valve creates interference taking out the spark plug when everything is mounted and the bike is together. Purchased a new wrench to remove the spark plug and all is ok. Overall happy 😁

1989-2004 Kawasaki KX500 Billet Cylinder Head Kit

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