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Ok Guys/Gals, I bought a bone stock used 2007 JK with the 3.8. There's a lot of opinions that these engines don't hold up well. How many miles, on average, do these engines go? Mine has 134,000 on the clock and has not been off road much, barring a few beach trips.

Hi guys. Looking to get more power from my '07 JK with the 3.8. Not much information out there other than a supercharger. Seeing they're not worth the money. My next thought is engine swap. What are y'all putting in? I'm clueless where to start.