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I installed the JDL catted UEL with a factory exhaust and I didn't notice a difference in the exhaust note. No rumble at all. Swapping out the muffler for the muffled track pipe from Nameless makes it sound like a typical tuner Subaru though. I dynoed it, un-tuned, and lost a significant amount of mid-range torque. After getting tuned some of the mid range torque was returned and a decent amount was gained at the top of the rev range. It weighs about 6 pounds less than the factory header so I guess I'll stick with it. For now.
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