TL;DR: SPELAB Exhaust Header for 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980,?1981,?1982,?1983, 1984,?1985, 1986, 1987, 1988, 1989, 1990, 1991 Dodge Pair 4-1 Long Tube Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaus…