You have managed to "subscribe" to immediate notification to an upper level often visited forum (like "General Tech and Repair" or "Modifications and Updates" or BOTH ) that gets posted to a lot.
Go to your User CP and list your subscriptions and either "unsubscribe" of change to "summary" instead of "immediate".
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Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL