Ditto on that looks good. I'll bet the reduction in fuel, is the seating of the piston rings...Lower blow-by at the regen cycle...In any case, this mod is on my list....Thanks for the update

BTW, how did you get your sample??
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7.5 3500QC 6.7CTD 68RFE Build date June 2007
Superchips tuner 3808, Boost/EGT Laser Gauge, Airaid cold intake