SPELAB Exhaust Header for Ford/Mercury L6 144/170/200/250 Cid Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust sound. SPELAB offers many products to help you create your own custom engine headers. It's really easy and convenient to use: direct bolt-on, no modification needed. Fitment: Make, Model Year(s) Additional Info Ford Bronco 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974 2.8L, 3.3L Ford Econoline 1961, 1962, 1963, 1964, 1965, 1966 2.4L, 2.8L Ford Fairmont 1978, 1979, 1980, 1981, 1982 3.3L Ford Falcon 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970 2.4L, 2.8L, 3.3L Ford Granada 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982 3.3L, 4.1L, Ford LTD 1983 3.3L Ford Mustang 1965, 1966, 1967, 1968, 1969, 1970 2.8L, 3.3L Ford Ranchero 1960, 1961. 1962, 1963, 1964, 1965 2.4L, 2.8L, 3.3L Ford Thunderbird 1980, 1981, 1982 3.3L Mercury Capri 1979, 1980, 1981, 1982 2.8L, 3.3L Mercury Comet 1960, 1961, 1962, 1963, 1964, 1965 2.4L, 2.8L, 3.3L Mercury Cougar 1981, 1982 3.3L Mercury Marquis 1983 3.3L Mercury Zephyr 1978, 1979, 1980, 1981, 1982, 1982 3.3L Specifications: Brand Name: SPELABModel: EH28046XCertificate: ISO9001:2000Application: Automobile Exhaust HeaderMaterial: Stainless SteelSurface: Mirror PolishOutlet Size: 2.00"Inlet Size: 1 1/8" X 1 1/4"Number of O2 Sensor Locations: 2Head Flange Thickness: 7/16"Outlet Flange Thickness: 3/8" Exhaust Header vs. Manifold: Which Is the Better Option for Performance? When comparing exhaust headers and manifolds, the primary differences lie in their materials, design, and performance impact. Material and Construction:Exhaust headers are constructed from lightweight, thin steel, while exhaust manifolds are made from heavier, thicker iron. The lighter material of exhaust headers contributes to overall weight reduction and better heat dissipation, improving engine efficiency. In contrast, the thicker iron used in manifolds can retain more heat and add extra weight to the engine, which may hinder performance. Design and Size:Exhaust headers are generally longer and feature individual pipes for each cylinder, which allows for smoother exhaust flow. The longer design of headers helps eliminate exhaust backpressure, enabling gases to exit the engine more efficiently. On the other hand, exhaust manifolds are typically shorter and feature a single chamber that collects exhaust gases from multiple cylinders, which can cause backpressure and reduce engine performance. Impact on Engine Performance:Exhaust manifolds create backpressure, which restricts the flow of exhaust gases, reducing overall engine performance, especially at higher RPMs. In contrast, exhaust headers prevent backpressure by providing each cylinder with its own exhaust tube, ensuring that gases exit the engine more freely. This leads to increased horsepower, improved throttle response, and better...