1970 DUSTER 340 FACTORY EXHAUST END CUTS w/o TIPS???
This is the 70-71 parts book for tailpipes. It doesn’t show sizes. But it does show what cars shared the same tail pipes
It shows:
70 Duster 340 and Swinger 340 without tips as same part number
71 Duster 340, 71 Demon 340, and 70 Swinger 340 with tips all with same part number.