All Air Filter Adapters (23)K&N All K&N Parts
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K&N Air Filter Adapters

Used to allow for various air filter applications on vehicles that otherwise would not provide proper fitment.

2.75in. to 2.25in. 8 Packs: These adapters are used with K&N's RD-4600 Universal Air Filter to fit onto Hillborn 2-1/4 In. restrictor stacks.

Universal K&N Air Filter Adapters
MSRPPrice
Air Cleaner Adapter Flange
Specifics:2.75 in. To 2.25 in. Adapter
8 per Pack
$37.00$22.56  Add to Cart
Air Cleaner Adapter Flange
Specifics:Size 1 1/8 in. Bore
2-Bolt
OD-2.75 in.
W-7/8 in.
$31.00$18.53  Add to Cart
Air Cleaner Adapter Flange
Specifics:Size 1 in. Bore
2-Bolt
OD-2 7/16 in.
W-5/8 in.
$15.00$9.30  Add to Cart
Air Cleaner Adapter Flange
Specifics:Size 1 in. Bore
2-Bolt
OD-2 in.
W-5/8 in.
$17.00$10.10  Add to Cart
Air Cleaner Adapter Flange
Specifics:VW Solex
Flange OD-3 in.
$34.00$20.63  Add to Cart
Air Cleaner Adapter Flange
Specifics:Weber DGV Series Carburetors
$137.00$82.41  Add to Cart
 
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Parts Available: 85-4600, 85-1070, 85-1090, 85-1180, 85-1010, 85-1061