US Manufacturing Facilities   Corona, California Hayden manufactures fan clutches and transmission oil coolers … Grapevine, Texas Four Seasons, Inc, our temperature controls division manufactures a complete line… Greenville, South Carolina This facility manufactures fuel injectors, HEI ignition coils, ignition coil-on-plug units… Independence, Kansas The Independence plant , manufactures a wide variety of automotive electronics… Mishawaka, Indiana This SMP business unit manufactures bulk ignition cable and ignition wire sets … Orlando, Florida This SMP business unit manufactures new electronics, DIS modules and MAP sensors…