Overview Reviews Product Description K&N adapters allow for even more air filter applications. Product Videos Custom Field MPN 21512-1 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: KNNRF-1038 K&N Unique Universal Air Filter 3.5in Flange ID / 3.5in Flange OD / 6in Height - RF-1038 MSRP: Now: $219.99 Add to Cart Quick view Details K&N Engineering | sku: KNNRU-1790 K&N Filter Universal Rubber Round Straight Filter 3.5in Flange 3in Height - RU-1790 MSRP: Now: $74.99 Add to Cart Quick view Details K&N Engineering | sku: KNNRC-5112 K&N Filter Universal Rubber Filter 3.5in Flange 6.625in Top 8in Height Center Hole - RC-5112 MSRP: Now: $199.99 Add to Cart ×
Quick view Details K&N Engineering | sku: KNNRU-1790 K&N Filter Universal Rubber Round Straight Filter 3.5in Flange 3in Height - RU-1790 MSRP: Now: $74.99 Add to Cart Quick view Details K&N Engineering | sku: KNNRC-5112 K&N Filter Universal Rubber Filter 3.5in Flange 6.625in Top 8in Height Center Hole - RC-5112 MSRP: Now: $199.99 Add to Cart ×
Quick view Details K&N Engineering | sku: KNNRC-5112 K&N Filter Universal Rubber Filter 3.5in Flange 6.625in Top 8in Height Center Hole - RC-5112 MSRP: Now: $199.99 Add to Cart