You should just check out the performance drop ins. Calibrated Power's stealth turbo is like a fleece cheetah without the ridiculous price tag. Support 650rwhp and spools like stock. There is also a Borg Warner drop in from Power Driven Diesel I used on my 12v with 5x12 I loved it worked really good on a 400ish Hp truck and stayed clean in the city it was an auto though.
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05 QCSB24v HTD 6.8L, DDP fueling PDD shifted
2011 MCSB 6.7, built 68rfe
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