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Exhaust Suggestions for a 1970 318 Satellite?

2" pipe, factory manifolds, Thrush mufflers, 2 BBl carburetor. reliable, good mileage increase, and surprising power in the midrange ( where you want it for passing). After a year or 2 the worn Thrush's sound great. 318 is an underappreciated power plant. Our 73 Satellite Sebring "plus" and 77 Gran Fury both run that set up and have over 200K without the heads ever leaving the block ( just timing chains). I always get "is that a 440" at the gas station "sure is....chuckle,chuckle" . Headers are not worth the grief in my book.
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