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I had a 2 1/2" TTI system with stock manifolds on my 440 Cuda...bad drone, especially at cruise 45-55 mph. I put on TTI 1 7/8" headers no other changes and drone went away. Overall car is probably a little louder with headers, but that annoying drone is gone and I can now cruise in comfort and listen to music if I want to.



How bad was your drone? It is really bad with my car, it is almost like pressure in my head, hard to describe but... very intense...

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