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The 79 400 Magnum use's Headman headers and a H piped exhaust @ 2-1/2 inchs with Hooker Aero Chambers.
The Duster's 318, a otherwise stock 79 engine with a small Crane cam use's Hooker headers w/ a Jegs exhaust system @ 2-1/2 inchs True duals.
My buddies 500 inch Indy headed Dart used Bus exhaust

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