PPE 128034511 Stage 4R Transmission Upgrade | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Features: - C1, C2, C3, C4 Included - Valve body recalibration kit, boost valve, pump shim and gaskets - 1 year limited warranty Heavy duty transmission upgrade To ensure your Allison transmission is up to the task for sled pulling, drag racing, daily driving, and off-roading, PPE offers their robust Stage 4R Transmission Upgrade Kit. This kit is their most powerful upgrade, ideal for enhancing the strength and reliability of your Allison transmission. Enhance Transmission to the Next Level Thanks to the triple clutch converter, valve body recalibration kit (recalibration kit does not change shift points, only increases clutch holding power), converter flow valve, and upgraded C1, C2, C3 and C4 clutches and Kolene steels. When you're ready to take your Allision transmission to the next level of durability and reliability, upgrade your Allision with PPE's Stage 4R Transmission Upgrade Kit. Fits: 2001-2004 GM 6.6L Duramax Application Notes: - NOTE: Torque Converter sold separately [Installation Instructions]