The standard-duty Hedman Hedders in this section come from the factory with an extremely durable, protective ceramic-metallic coating. Hedman Hedders, pioneered the use of ceramic-metallic coatings, back in the early 80's. Previously used exclusively in the aerospace industry, Hedman Hedders recognized it's potential for improving both the lifespan, and functionality of exhaust Hedders. Hedman Hedders Elite Hedders Exhaust Hedder 68308 Tube Size 1 5/8 in. - Collector Size 3 in. - w/o Smog Injection Or Injection HeddersUltra Duty 14 Gauge Primary TubesCeramic Metallic Coating Stands Temp. Up To 1400 FDurable 3/8 in. Flanges Prevent WarpingAnd Stands Up Better Against Brutal PunishmentDurable And AffordablePit Stop USAoffers Hedman Hedders Elite Hedders Exhaust Hedder 68308 at low everyday prices. Be sure to check out all of the products from Hedman Hedders including Hedman Exhaust System Parts and Accessories, Hedman Hedder, Hedman Hedders, Hedman Full Length Hedders, Hedman SB Chevy Hedders.