Back in the 1960s it wasn’t uncommon to see scores of muscle cars like Mustangs, Camaros, and the like lined up at the local exhaust shop to have a set of Thrush’s red Glasspack mufflers installed.
If you're old enough, you might remember when Thrush hit the muscle-car scene in the late-1960s with its Thrush Glasspack muffler. If you're old enough to remember that, then you may not want to ...
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