Manufactured in the Netherlands using a special dual-layer foam, formulated for maximum filtration and optimum air flow. Coarse open-pore foam catches airborne dirt, grime and sand while the fine open-pore inner foam acts as a second filter to trap the smallest particles. Top quality materials and superior construction allow the filter to be used over and over again without any loss of performance. Made to fit the factory air box and are a direct replacement for original equipment filters. No need to change carburetor jets or settings. KTM 125 EXC 98-03, 125 EXE 00-01, 125 SX/MXC 98-03, 125 SXS 99-03, 200 EGS 98-99, 200 EXC/MXC 98-03, 200 SX 98-04, 250 EGS 98-99, 250 EXC 98-03, 250 EXC Racing 03, 250 EXC Six Days 98-03, 250 MXC 99-03, 250 SX/SXS 98-03, 300 EGS 98-99, 300 EXC/MXC 98-03, 300 SX 98-02, 380 EGS 98-99, 380 SX/SXS/EXC/MXC 98-02, 400 EXC Racing (1 Hole Air Filter) 04-05, 400 LC-4 00, 400 LC-4 (1 Hole Air Filter) 01-03, 400 SX/MXC/EXC (1 Hole Air Filter) 04-05, 520 SX/MXC/EXC 00, 520 SX/MXC/EXC (1 Hole Air Filter) 01-02, 525 SX/MXC/EXC (1 Hole Air Filter) 03, 85 SX 04