Tuning Tricks Rebuilder
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2a. Luckily, a rebuilder put us in touch with Mahle Motorsports, who is most famous for its pistons, but is now producing brand-new heads for the 4.0L. The heads are 4 pounds heavier than stock, and all that extra cast iron in the right places makes this new casting practically bulletproof. They come ready to build right out of the box. View Related Article
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