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Will a 3.6 jku muffler work on a 3.8 jku?

Friend gave me a muffler which is unused from his 3.6 jku... Will it work on my 3.8 jku without any issues?

I know the pipes are different but what about the muffler only.... Thanks guys!
 

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The exhaust system including the muffler are designed for a specific engine. The 3.6 is a freer breathing engine with higher ECU control. If nothing else the difference in back pressure could reduce performance and fuel economy.
 
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