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1970 Duster with stock 225 slant six, factory style single exhaust but with a Thrush Turbo muffler installed. Factory exhaust manifold into 1 7/8 pipe to the muffler, exiting out the factory (1 3/4 or 1 5/8?) tail pipe.

[ame="http://www.youtube.com/watch?v=4InkN58P25I"]YouTube- 225 Slant Six with Thrush Turbo Muffler - 1970 Plymouth Duster[/ame]