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I am looking for advice about Speed Engineering headers from people who have run them or are running them now. Looking to make my car louder on a budget. Are they decent quality? I've seen good things and bad things. I would be running it with stock active mufflers and a Roush X-pipe res delete...

I am a new Mustang owner. When I'm in sport+, the downshifts are super hard; it feels like I got rear ended. I get it downshifting into 8th gear, as well as 5th gear, and the hardest is when it goes down into 3rd gear. I know the 10R80 can be a funky transmission, but I'm wondering if this is...