That jet is just a drain, the hose is clamped off from the factory make sure it is open. Never had a need to make it bigger.
Re the rings, most manufacturers have differing thoughts on them. Some have the gaps in constant contact with the wall, which I prefer, others have them passing over the transfer/boost ports. They are small enough that it isn?t an issue.
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Back on a gassy! 2018 EC300! 🤘
Txt 280 07 to make me feel like a gumby again
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