The long tube headers are designed for 1988-1997 Chevy/GMC vehicles with SBC 305/350 (5.0L/5.7L) engines. These headers are crafted from durable T304 stainless steel for maximum strength and long-lasting durability. Featuring a 1.5" inlet and 3.0" outlet, they offer improved exhaust flow, boosting horsepower and torque by 10-15 HP. The Chevy 305 and 350 long tube headers are TIG welded, come with reducers, bolts, and a metal gasket, and are engineered for better engine efficiency.