I'm with Chuck. Looks like a P trap cutout and either the threw in the Hepvo as OE or in the years since it was built someone changed the P trap to the hepvo.
https://hepvo.com/
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Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
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