Big Block Stainless Steel Exhaust Header

The SPELAB Exhaust Header (model EH28624) is a performance upgrade designed for a wide range of 1965-1975 Chevrolet and GMC Big Block vehicles. It is constructed from durable 16-gauge stainless steel, featuring TIG-welded joints and CNC-machined flanges for maximum strength and longevity, particularly suited for demanding use. This exhaust header is designed to increase high flow air intake, with the manufacturer claiming an instant gain of 10-15 horsepower and torque. The design eliminates the back pressure typically created by exhaust manifolds, allowing gases to exit more freely. Installation is described as a direct bolt-on process, requiring no vehicle modifications. Key specifications for this header include a 2.85" outlet size, 1.65" square primary tube size, a 7/16" head flange thickness, and a 3/8" outlet flange thickness. It is ISO9001:2000 certified, indicating adherence to quality management standards. The fitment list for this header is extensive, covering various models such as the Chevy Chevelle, El Camino, Laguna, Caprice, Kingswood, Camaro, Malibu, Impala, Bel Air, Biscayne, Brockwood, and Townsman, all within the specified 1965-1975 model years and compatible with 6.5L, 6.6L, and 7.4L Big Block engines.