INTRODUCING CE SERIES WITH CUMMINS ISB6.7

INTRODUCING CE SERIES WITH CUMMINS ISB6.7

OVERVIEW 1. Introducing the Cummins ISB6.7 2. Cummins ISB6.7 Features, Technology and Enhancements 3. The CE Engine Portfolio

INTRODUCING THE CUMMINS ISB6.7 What do you get when you take the industry s best selling medium-duty diesel engine and the most popular conventional-style bus over the past decade? A product that raises the bar. A time-tested design that features the Cummins SCR after-treatment system, the CE Series with Cummins ISB6.7 will offer the durability and uptime you demand while meeting EPA 2010 emissions. As Cummins ISB6.7 joins an engine line-up that includes the MaxxForce 7 and DT, IC Bus now offers the widest choice of diesel powertrain options in the bus industry.

BLUE DIAMOND JOINT VENTURE Through our Blue Diamond JV, Navistar has extensive experience designing and building trucks with the Cummins ISB6.7 Engine. The Ford F650/750 Trucks, for which we have built over 20,000 units, share a common chassis with the Navistar DuraStar truck Model. This experience has enabled us to minimize the amount of time it took to bring the ISB6.7 to market in the CE Series Bus. Customer s can feel confident that quality and performance will be top notch at Job 1. These trucks are surpassing warranty and quality objectives and we expect the same results with the CE Series.

CUMMINS ISB6.7 FEATURES, TECHNOLOGY & ENHANCEMENTS

MAJOR FEATURES VGT Turbocharger The patented design is widely recognized as the industry leader for performance. Electric actuation improves precision and responsiveness. The VGT Turbocharger also increases fuel economy and braking horsepower. High Pressure Common Rail (HPCR) Higher injection pressures produce quick throttle response at every rpm. Optimized timing increases fuel efficiency, lowers emissions and enables smoother, quieter operation. Single High-Capacity Electronic Control Module (ECM) A single ECM manages the engine and aftertreatment system for optimum performance and fuel efficiency. Cummins SCR Aftertreatment System Proprietary system consists of a Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) technology for near-zero emissions.

FUEL ECONOMY The 2013 ISB6.7 gets some of the best fuel economy of any engine in its class. In 2013, the ISB6.7 gets up to 2 percent better fuel economy versus the 2012 model. The addition of an air-intake throttle makes the Exhaust Gas Recirculation (EGR) system more efficient, to increase fuel economy and lower operating costs.

2013 ENHANCEMENTS Better Fuel Economy 2013 certification meeting the 2014 fuel efficiency and greenhouse gas standards Reduction in parasitic losses Better Reliability Continuous improvement NanoNet filter Better Customer Support Additional components covered with new Extended Coverage plans

BETTER RELIABILITY A new ECM for the 2013 product controls the DEF Dosing Valve and helps improve the overall efficiency and reliability of the Cummins Aftertreatment System. The VGT Turbocharger, EGR Crossover Tube and EGR Valve Orientation have all been on engine improvements. The VGT Turbocharger s actuator has been improved, the actuator controls the Variable Geometry portion of the Turbocharger. Improving the actuator leads to reliability and efficiency improvements for the ISB6.7. Another area of improvement of the ISB6.7 has been with the EGR. The Crossover Tube allows for easier installation for the OEMS and assists with the EGR flow. The Valve and Valve orientation also assists with OEM installation and has an internal seal that prevents water leaking into the EGR Cooler.

BETTER RELIABILITY EGR Crossover Tube And EGR Valve Orientation ECM There has also been an EGR Crossover Tube routing change which has lead to improvements in EGR reliability. The Valve orientation change switched from a vertical valve to a horizontal valve. There is also an addition of an internal seal to protect against water intrusion. The New ECM 2350 incorporates all changes needed to meet the 2013 OBD requirements. The ECM 2350 incorporates the DEF Doser Valve controls which helps improve the reliability of the Cummins Aftertreatment System.

BETTER RELIABILITY VGT Turbocharger Improvements to the actuator, which controls the VG section of the Turbo, leads to improved reliability.

CUSTOMER SUPPORT Over 100 specialists trained to provide the highest level of professional service 24/7/365 Customer Support Dependable service support when you need us most

ISB6.7 TECHNICAL SPECIFICATIONS Configuration: Inline 6-Cylinder Displacement: 409 in³ (6.7L) Bore and Stroke: 4.21 x 4.88 in Compression Ratio: 17.3:1 Peak Horsepower: 260 @ 2600 RPM Peak Torque: 660 @ 1600 RPM Gov. Speed: 2600 RPM Clutch-Engagement Torque: 400 (lb.-ft.) Aspiration: Variable Geometry Turbocharger Fuel System: High Pressure Common Rail Lubricating System Capacity: 15L Dry Weight: 1150 lb. The technical specifications do not change from 2010 with the exception of the system weight. The overall system weight has increased due to an increase in the aftertreatment system weight.

ISB6.7 HP & TORQUE RATINGS Ratings range from 200-260 hp and 520-660 lb-ft of torque. Horsepower (BHP @ RPM): 200 @ 2300 Torque (LB-FT @ RPM): 520 @ 1600 Gov. Speed (RPM): 2600 Clutch Engagement Torque: 400 lb-ft Horsepower (BHP @ RPM): 220 @ 2300 Torque (LB-FT @ RPM): 520 @ 1600 Gov. Speed (RPM): 2600 Clutch Engagement Torque: 400 lb-ft Horsepower (BHP @ RPM): 250 @ 2300 Torque (LB-FT @ RPM): 660 @ 1600 Gov. Speed (RPM): 2600 Clutch Engagement Torque: 400 lb-ft Horsepower (BHP @ RPM): 260 @ 2300 Torque (LB-FT @ RPM): 660 @ 1600 Gov. Speed (RPM): 2600 Clutch Engagement Torque: 400 lb-ft Horsepower (BHP @ RPM): 240 @ 2300 Torque (LB-FT @ RPM): 560 @ 1600 Gov. Speed (RPM): 2600 Clutch Engagement Torque: 400 lb-ft

ISB6.7 MAINTENANCE INTERVALS Maintenance Item Normal Duty Miles Severe Duty Miles Hours Months Oil and Filter 15,000 9,000 500 6 Fuel Filter 15,000 15,000 500 6 Coolant Filter 15,000 15,000 500 6 Standard Coolant 60,000 60,000 2,000 24 Valve Adjustment 150,000 150,000 5,000 48 Crankcase Breather Filter 75,000 75,000 2,000 24 DEF Filter 200,000 200,000 6,500 N/A Particulate Filter 200,000 200,000 6,500 N/A

ISB6.7 BASE WARRANTY Base engine warranty coverage for Cummins school bus applications includes virtually everything from parts and labor on warrantable failures* to limited progressive damage for both the engine and after treatment system, with no deductible. Every component from the block casting to the injectors to the after treatment system is covered for 5 years/100,000 miles (160,935 km). (*Warrantable failures are those due to defects in Cummins materials or factory workmanship.) Cummins has a wide variety of extended protection plans available, including new 10-year extended coverage options for school bus engines.

THE CE SERIES ENGINE PORTFOLIO

KEY ENGINE DIFFERENCES MaxxForce 7 Parent Bore CGI engine block for high strength without added weight Ductile Iron bedplate for strength EGR MaxxForce DT Long term durability and rebuildability Wet sleeve design Replaceable valve guide and seats EGR Cummins ISB Parent Bore Great fuel economy Best selling medium duty engine in the industry Proven engine and SCR aftertreatment meets EPA 2010

Cummins ISB6.7 MaxxForce 7 MaxxForce DT Configuration Inline 6 V-8 Inline 6 Horsepower 200 260 HP 220 260 HP 215 300 HP Torque 520 660 lb-ft 560-660 lb-ft 560 660 lb-ft Bore & Stroke 4.21 x 4.88 in 3.87 x 4.13 in 4.59 x 4.68 Displacement 409 in³ (6.7L) 390 in³ (6.4L) 466 in³ (7.6L) Fuel Injection System Common Rail (electro-mechanical) Common Rail (Piezo injectors) Electro-Hydraulic Gen 2 Fuel Injectors Emissions Technology Selective Catalytic Reduction (SCR) Exhaust Gas Recirculation (EGR) Exhaust Gas Recirculation (EGR) Parent Bore vs. Sleeved Parent Bore Parent Bore Wet Sleeve

SUMMARY As Cummins ISB6.7 joins an engine line-up that includes the MaxxForce 7 and DT, IC Bus now offers the widest choice of diesel powertrain options in the bus industry. The Cummins ISB6.7 is the best selling medium range diesel in the industry and meets EPA 2010 The Navistar and Cummins partnership offers unrivaled service and support The expansion of our partnership with Cummins and the investment in the CE demonstrates our commitment to leadership in the bus industry