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I like the Thermal also, but is the sound signature much different between the 2.5 and 3? And (being new) I see a lot of clamps on the Therma. Isn't that an issue (or at least a potential issue)?
there has been a few issues with the clamps on the Thermal. some have had to change the clamps to something different due to the clamps failing to stay tight. I actually am having an issue with my rear muffler sagging due to the clamps not holding tight enough. i might put a quick tack on it just to keep it from moving as it has moved several times since the install.
Thermal 2.5 has no highway drone. I currently have it installed. I have had Borla S Type and Magnaflow in the early days on my 2020 Explorer ST. Magnaflow was the only one with a pronounced highway drone.