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I ran a o/r h with the Adrenalines for 1 day (when i put my long tubes on) and didn't like it personally. Little to tinny/raspy/poppy for my liking. On the other hand my catted MRT h sounded great with the Adrenalines.
They are the deeper of the 2 mufflers (termis and a o/r pipe sounded horrible IMO) but i still didn't like the overall sound. That's just my opinion of course.
To be honest i can't imagine the LM 2's or Magnapacks being much better with a o/r h but who knows. Again that's just my opinion. You might like them with the o/r h. There's a guy down the road (he's a member on here as well) who has the Adrenalines with a o/r x and shorties on his gt, and it sounds great.