BD Diesel Valve Body - 2006-2007 Duramax LBZ Allison 1000 1030472

Modified, tuned and tested to provide optimum performance; Revised valve design; Larger oil ports; Proprietary governor piston dimensions; Hand-lapped surfaces prevent internal leakage; New trim valves increase mainline pressure; Improved shift quality; Increased clutch holding capacity; Reduced friction and extends transmission life; UPS shipping label included to return back core for free (USA only)