QS9000 certificate in 1998 Supply to USA OEM and aftermaket more than 10000000. Many kinds valve guide and insert for CUMMINS, GM, FORD, TOYOTA, MAZDA, ISUZU, NISSAN, CATERPILLAR,HONDA,etc. Guide list ALLIS CATERPILLER CHRYSLER FORD GM MITSUBISHI WAUKESHA HONDA MAZDA NISSAN ISUZU SUZUKI KOMATSU Insert list BMW CAT CHRYSLER CUMMINS FORD GM HONDA HYUNDAI ISUZU KOMATSU MAZDA NISSAN TOYOTA VOLVO ...