Overview Reviews Product Description K&N adapters allow for even more air filter applications. Product Videos Custom Field Category Air Intake Systems>Air Intake Components MPN 21512-1 CARB This product is not CARB Legal and not for sale in California Product Reviews Write a Review Write a Review × K&N Engineering K&N Universal Adapter 6 Inch Filter 3.5in Coupler - 21512-1 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *
Quick view Details K&N Engineering | sku: KNNRU-2510 K&N Universal 4 Inch Filter - RU-2510 MSRP: Now: $54.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-3280 K&N Filter Universal Rubber Filter 6 inch Flange 7.5 inch Base 5 inch Top 10 inch Height - RU-3280 MSRP: Now: $66.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-3580 K&N Filter Universal Rubber Filter 3 Inch Flange 6 inch Base 4 inch Top 5 inch Height - RU-3580 MSRP: Now: $54.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-0360 K&N Filter Universal Rubber Filter - Round Straight 3.5in Base OD x 3.5in Top OD x 5in H - RU-0360 MSRP: Now: $78.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-0600 K&N Filter Universal Rubber Filter 2 1/4 inch Flange 3 1/2 inch OD 4 inch Height - RU-0600 MSRP: Now: $54.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-3120 K&N Universal Rubber Filter - RU-3120 MSRP: Now: $62.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-5114 K&N Filter Universal Rubber Filter 3.5in Flange ID x 5in OD x 5.625in H - RU-5114 MSRP: Now: $86.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRC-5046 K&N Universal Chrome Filter 6 inch FLG / 7.5 inch Base / 4.5 inch Top / 9 inch Height - RC-5046 MSRP: Now: $86.95 Add to Cart × OK
Quick view Details K&N Engineering | sku: KNNRU-3280 K&N Filter Universal Rubber Filter 6 inch Flange 7.5 inch Base 5 inch Top 10 inch Height - RU-3280 MSRP: Now: $66.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-3580 K&N Filter Universal Rubber Filter 3 Inch Flange 6 inch Base 4 inch Top 5 inch Height - RU-3580 MSRP: Now: $54.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-0360 K&N Filter Universal Rubber Filter - Round Straight 3.5in Base OD x 3.5in Top OD x 5in H - RU-0360 MSRP: Now: $78.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-0600 K&N Filter Universal Rubber Filter 2 1/4 inch Flange 3 1/2 inch OD 4 inch Height - RU-0600 MSRP: Now: $54.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-3120 K&N Universal Rubber Filter - RU-3120 MSRP: Now: $62.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-5114 K&N Filter Universal Rubber Filter 3.5in Flange ID x 5in OD x 5.625in H - RU-5114 MSRP: Now: $86.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRC-5046 K&N Universal Chrome Filter 6 inch FLG / 7.5 inch Base / 4.5 inch Top / 9 inch Height - RC-5046 MSRP: Now: $86.95 Add to Cart × OK
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Quick view Details K&N Engineering | sku: KNNRU-0360 K&N Filter Universal Rubber Filter - Round Straight 3.5in Base OD x 3.5in Top OD x 5in H - RU-0360 MSRP: Now: $78.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-0600 K&N Filter Universal Rubber Filter 2 1/4 inch Flange 3 1/2 inch OD 4 inch Height - RU-0600 MSRP: Now: $54.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-3120 K&N Universal Rubber Filter - RU-3120 MSRP: Now: $62.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-5114 K&N Filter Universal Rubber Filter 3.5in Flange ID x 5in OD x 5.625in H - RU-5114 MSRP: Now: $86.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRC-5046 K&N Universal Chrome Filter 6 inch FLG / 7.5 inch Base / 4.5 inch Top / 9 inch Height - RC-5046 MSRP: Now: $86.95 Add to Cart
Quick view Details K&N Engineering | sku: KNNRU-0600 K&N Filter Universal Rubber Filter 2 1/4 inch Flange 3 1/2 inch OD 4 inch Height - RU-0600 MSRP: Now: $54.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-3120 K&N Universal Rubber Filter - RU-3120 MSRP: Now: $62.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-5114 K&N Filter Universal Rubber Filter 3.5in Flange ID x 5in OD x 5.625in H - RU-5114 MSRP: Now: $86.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRC-5046 K&N Universal Chrome Filter 6 inch FLG / 7.5 inch Base / 4.5 inch Top / 9 inch Height - RC-5046 MSRP: Now: $86.95 Add to Cart
Quick view Details K&N Engineering | sku: KNNRU-3120 K&N Universal Rubber Filter - RU-3120 MSRP: Now: $62.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-5114 K&N Filter Universal Rubber Filter 3.5in Flange ID x 5in OD x 5.625in H - RU-5114 MSRP: Now: $86.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRC-5046 K&N Universal Chrome Filter 6 inch FLG / 7.5 inch Base / 4.5 inch Top / 9 inch Height - RC-5046 MSRP: Now: $86.95 Add to Cart
Quick view Details K&N Engineering | sku: KNNRU-5114 K&N Filter Universal Rubber Filter 3.5in Flange ID x 5in OD x 5.625in H - RU-5114 MSRP: Now: $86.95 Add to Cart Quick view Details K&N Engineering | sku: KNNRC-5046 K&N Universal Chrome Filter 6 inch FLG / 7.5 inch Base / 4.5 inch Top / 9 inch Height - RC-5046 MSRP: Now: $86.95 Add to Cart
Quick view Details K&N Engineering | sku: KNNRC-5046 K&N Universal Chrome Filter 6 inch FLG / 7.5 inch Base / 4.5 inch Top / 9 inch Height - RC-5046 MSRP: Now: $86.95 Add to Cart