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1,899 Posts
Depends on the power your making..... its efficent enough for stock power. its a shame they charge $25k plus and put the cheap stuff they do on these rigs, on my 06' and now my 08' i have put the BD intercooler on them, and it helped lower EGTS quite a bit!
K2 Diesel Performance : BD Power Cool-It Intercooler
K2 Diesel Performance : BD Power Cool-It Intercooler