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<blockquote data-quote="shopworker" data-source="post: 2415530" data-attributes="member: 53293"><p>Going off memory here but I think I remember a pcm can't remember if it was 4.8 or 6.0. But when you replace the engine your suppose to replace cats and muffler otherwise it will trash the new engine. To much back pressure. Again going off memory</p></blockquote><p></p>
[QUOTE="shopworker, post: 2415530, member: 53293"] Going off memory here but I think I remember a pcm can't remember if it was 4.8 or 6.0. But when you replace the engine your suppose to replace cats and muffler otherwise it will trash the new engine. To much back pressure. Again going off memory [/QUOTE]
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