FunnelWeb Filter uses a unique pyramid profiled foam. This design vastly improves the dirt holding capacity while delivering consistent optimum air flow. All FunnelWeb Filters utilize the latest technology in open cell polyurethane foam profiling, this substantially increases the filter*s surface area enabling it to trap far more dirt on its outside surface preventing harmful dust from penetrating through. *Works with any foam air filter oil.Features: FunnelWeb Filter uses a unique pyramid profiled foam This design vastly improves the dirt holding capacity while delivering consistent optimum air flow. All FunnelWeb Filters utilize the latest technology in open cell polyurethane foam profiling, this substantially increases the filter's surface area enabling it to trap far more dirt on its outside surface preventing harmful dust from penetrating through. Fitment Husqvarna FC 250 2023 Husqvarna FC 350 2023 Husqvarna FC 450 2023 Husqvarna FX 350 2023 Husqvarna FX 450 2023 Husqvarna TC 125 2023 Husqvarna TC 250 2023 KTM 125 SX 2023 KTM 250 SX 2023 KTM 250 SX-F 2023 KTM 250 XC 2023 KTM 250 XC-F 2023 KTM 300 SX 2023 KTM 300 XC 2023 KTM 350 SX-F 2023 KTM 350 XC-F 2023 KTM 450 SX-F 2023 KTM 450 XC-F 2023