2001 - 2004 GM 6.6L LB7 Duramax | Allison Transmission Tuning by PPEI Parts_Clutch Weights We've taken traditional and made

2001 - 2004 GM 6.6L LB7 Duramax | Allison Transmission Tuning by PPEI Parts_Clutch Weights We've taken traditional and madeCARB EO Pending Extend your transmission life and increase your fuel economy with PPEI Transmission tuning! A MUST for tuned trucks with additional torque. The refined shift points get rid of the low rpm Lazy feel these trucks have that force the driver to stab the throttle for a downshift not cool and a fuel economy killer! For vehicles with larger turbochargers, ppei transmission tuning is a must to get the engine back into a rpm range to match the

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