EMPI now offers an 1 5/8" Merged Competition Header System for use with special 1 1/2" flanged racing heater boxes. This enables you to have a defroster / heater system and still have a hi-performance merged exhaust system. Header features thick H.D. Flanges with ground flat gasket surfaces. All internal welds are ground for true high flow performance. Headers are supplied with an EMPI swivel flange racing stinger. Heater boxes have lightweight inner coils to still generate good heater output while 1 1/2" tubing allows for less restriction on your hi-performance motor! Then choose from heater boxes or 1 5/8" J-tubes to complete your installation. All components are available also with a ceramic coat finish instead of painted. In addition you can use the hideaway muffler.