Stage 6G Transmission Upgrade Kit 600-800HP

Features:

• Includes upgraded C1, C2, C3, and C4 clutch packs with high-performance Kolene steels

• Valve body recalibration kit increases clutch holding power (does not change shift points)

• Includes converter flow valve, boost valve, pump shim, and complete gasket set

• Designed to handle 600–800 horsepower

• Engineered for high-stress, heavy-duty, and performance applications

• Backed by a 1-year limited warranty

• Torque converter sold separately

Take Your Allison Transmission to the Next Level

Push your 2011–2019 6.6L Duramax Allison-equipped truck to new limits with the PPE Stage 6G Transmission Upgrade Kit (128035514). Built to support 600–800HP, this kit is engineered for high-torque, high-performance builds that demand reliable power delivery and long-term transmission durability under extreme conditions. The kit includes PPE’s upgraded C1–C4 clutch packs, built with precision Kolene steels and friction materials to drastically increase holding capacity and withstand high heat. Paired with a valve body recalibration kit, converter flow valve, boost valve, and all necessary gaskets and pump shims, this package reinforces the transmission’s internal hydraulics and mechanical strength, ensuring confident shifting even under intense load. Though the recalibration kit does not alter shift points, it increases internal line pressure, giving the clutches more bite and extending transmission life in high-horsepower towing, racing, sled pulling, or tuned daily driver applications.

Fitment:
2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 GM Silverado/Sierra 2500HD & 3500HD 6.6L Duramax
Fits Allison 1000 transmissions

Install Time:
Professional installation strongly recommended

Warranty:
1-Year Limited Warranty, covers manufacturing and material defects (labor not included)

Fitment Notes:

• Torque converter sold separately

• Ideal for trucks in the 600–800 horsepower range

• Supports trucks with custom tuning, larger turbos, or high-load towing requirements

• Designed for performance, racing, or extreme-duty hauling