What’s the part name for exhaust and size

my5thmopar said

What size and where to get that’s not $190 bucks.

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See if a muffler shop can form you x 2 lips on pipe ( if you have the pair of factory flanges) & have them put a bend or 2 in ea side/one for you to build back on from there, for duals (it depends if their hyd bender has the former for your exh man outlet shape ( built a couple of N/A Y head/engine pipes this way)
There's a concern that sells discounted Walker, I'll. Track down name & Post for you (& others).
In Australia they Call that front pipe an "Engine Pipe" descriptive eh ? :-P.
Best of luck.
PS on that 440 use a couple of Stock Plymouth Fury III Mufflers if on an RV/Truck - mellow but free flowing with duals, pair of 2" tailpipes will up low end torque & throttle response.