Overview Reviews Product Description Uni Filter Dirt Bike Foam Air Filters have been unsurpassed in both engine protection and overall performance for over 50 years. Their unique two-stage design produces more horsepower and more torque than any other air filter. Product Videos Custom Field Clearance Item N MPN NU-4148ST Product Reviews Write a Review Write a Review × Uni Filter Uni Filter 18-19 Honda CRF 250 R / 17-20 CRF 450 R / 17-24 CRF 450 RX Air Filter - NU-4148ST Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *
Quick view Details Uni Filter | sku: UNINU-4154ST Uni Filter 2025 Honda CRF 250 R / CRF 450 R Air Filter - NU-4154ST MSRP: Now: $37.95 Add to Cart Quick view Details Uni Filter | sku: UNINU-4153ST Uni Filter 22-24 Honda CRF 250 R / 22-24 CRF 250 RX / 21-24 CRF 450 R Air Filter - NU-4153ST MSRP: Now: $35.95 Add to Cart Quick view Details Hot Rods | sku: HDSP226 Hot Rods 17-24 CRF 450 R/19-24 CRF 450 RWE?17-24 CRF 450 RX Crank Pin - P226 MSRP: $30.95 Now: $29.40 View Details Quick view Details Vertex Pistons | sku: VEP819064 Vertex Pistons 17-18 CRF 450 R/17-18 CRF 450 RX Clutch Cover Gasket - Outer - 819064 MSRP: $9.75 Now: $9.26 Add to Cart Quick view Details Vertex Pistons | sku: VEP24187A Vertex Pistons 17-18 CRF 450 R/17-18 CRF 450 RX Forged Replica Piston Kit - 24187A MSRP: $274.95 Now: $247.46 View Details
Quick view Details Uni Filter | sku: UNINU-4153ST Uni Filter 22-24 Honda CRF 250 R / 22-24 CRF 250 RX / 21-24 CRF 450 R Air Filter - NU-4153ST MSRP: Now: $35.95 Add to Cart Quick view Details Hot Rods | sku: HDSP226 Hot Rods 17-24 CRF 450 R/19-24 CRF 450 RWE?17-24 CRF 450 RX Crank Pin - P226 MSRP: $30.95 Now: $29.40 View Details Quick view Details Vertex Pistons | sku: VEP819064 Vertex Pistons 17-18 CRF 450 R/17-18 CRF 450 RX Clutch Cover Gasket - Outer - 819064 MSRP: $9.75 Now: $9.26 Add to Cart Quick view Details Vertex Pistons | sku: VEP24187A Vertex Pistons 17-18 CRF 450 R/17-18 CRF 450 RX Forged Replica Piston Kit - 24187A MSRP: $274.95 Now: $247.46 View Details
Quick view Details Hot Rods | sku: HDSP226 Hot Rods 17-24 CRF 450 R/19-24 CRF 450 RWE?17-24 CRF 450 RX Crank Pin - P226 MSRP: $30.95 Now: $29.40 View Details Quick view Details Vertex Pistons | sku: VEP819064 Vertex Pistons 17-18 CRF 450 R/17-18 CRF 450 RX Clutch Cover Gasket - Outer - 819064 MSRP: $9.75 Now: $9.26 Add to Cart Quick view Details Vertex Pistons | sku: VEP24187A Vertex Pistons 17-18 CRF 450 R/17-18 CRF 450 RX Forged Replica Piston Kit - 24187A MSRP: $274.95 Now: $247.46 View Details
Quick view Details Vertex Pistons | sku: VEP819064 Vertex Pistons 17-18 CRF 450 R/17-18 CRF 450 RX Clutch Cover Gasket - Outer - 819064 MSRP: $9.75 Now: $9.26 Add to Cart Quick view Details Vertex Pistons | sku: VEP24187A Vertex Pistons 17-18 CRF 450 R/17-18 CRF 450 RX Forged Replica Piston Kit - 24187A MSRP: $274.95 Now: $247.46 View Details
Quick view Details Vertex Pistons | sku: VEP24187A Vertex Pistons 17-18 CRF 450 R/17-18 CRF 450 RX Forged Replica Piston Kit - 24187A MSRP: $274.95 Now: $247.46 View Details