International DuraStar

International 4000 series
International DuraStar
International 4000 series; International DuraStar;
	2016 International DuraStar 4300 box truck
Overview
Manufacturer	2001–2009: Blue Diamond Truck, LLC (Ford/Navistar joint venture); 2009–2018: Navistar International;
Production	2001–2018
Body and chassis
Class	Class 5; Class 6; Class 7;
Layout	4x2; 6x4;
Body style(s)	Chassis cab; Semitractor;
Vehicles	International 4100, 4200, 4300, 4400; International DuraStar; International MV; International RXT; International 3200, 3300;
Related	Ford F-650 Super Duty/F-750 Super Duty; International TerraStar; International 7300/7400, WorkStar, HV; International 8500/8600, TranStar, RH; International ProStar, LT; International LoneStar;
Chronology
Predecessor	International 4000 series (1989)
Successor	International MV

The International DuraStar line, known as the 4000 series prior to 2008, is a line of medium-duty trucks produced by Navistar International from 2001 until 2018. Introduced as the successor to the International 4000 series of 1989–2001, the 4000 series was renamed the DuraStar in 2008. Developed as a Class 6-7 product range, the 4000/DuraStar was slotted below the 8000/TranStar regional-haul semitractor, with the Class 5 International TerraStar (2010–2015) serving as the smallest International conventional-cab product range.

The most distinctive features of the DuraStar are the "crescent shape" headlights and a distinctive "black spot" on the left side of the cab. Produced as both a semitractor and a straight/rigid truck, the 4000/DuraStar has been used in a wide variety of applications, including emergency vehicles, towing, flatbed trucks, and cargo box trucks. For bus use, the chassis is used in both cowled-chassis and cutaway-cab configurations for school bus and commercial applications.

The DuraStar was replaced by the new International MV Series in 2018.