I have a custom H-pipe that started from an OEM '10 GT, GT mufflers, and OTA pipes from Pypes. Sounds really clean just a bit louder and deeper than stock. The guys at the exhaust shop said it was one of the best setups they've heard on a 4.0, and I agree. Everything I've heard in person was a bit too raspy for me, but it's all a matter of preference.
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“I don’t lose any sleep at night over the potential for failure. I cannot even spell the word.”
Gen. James "Mad Dog" Mattis USMC (Ret.)