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At a minimum I would tune out the EGR and SCR systems. Better yet, tune them out and toss the EGR in the trash and replace with an AARodriguez racepipe, which will free up a lot of space. These changes plus a couple of other routine items (principally harmonic balancer, engine mounts, and vacuum hoses) will head off CBU and mitigate probably 75 percent of your reliability problems.
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