1 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division

2 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division Bosch Worldwide:  Founded in 1886  World’s largest manufacturer of automotive equipment  Subsidiaries, affiliated companies and agencies in over 140 countries  40 joint ventures  Sales - $52.3 billion  251,000 employees Bosch North America:  80 manufacturing sales and service locations for: - Automotive Original Equipment - Power Tool & Accessories - Aftermarket Products - Security Technology - Industrial Equipment - Household Appliances  Automotive O.E. customers include Ford, GM, & DaimlerChrysler  Sales - $8.8 Billion  24,750 employees

3 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division  Bosch spark plugs feature a Pyranit insulator. The most important part of the spark plug. It’s made of 95% Aluminum Oxide and glassy additives to hold up under extreme voltage and temperatures. The Thermal conductivity of the insulator is crucial for establishing the plug heat range performance under varied conditions. Bosch has gone one step further to create an exclusive insulator mixture for optimum performance in industrial engine applications. Pyranit Insulator Features and Benefits

4 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division Features and Benefits  Notice the differences in designs of the insulator “Foot” between Bosch and Brand “C”. Bosch optimized the shape and heat transfer properties of the insulator to improve thermal behavior and resistance to combustion deposits. Bosch Brand “C”

5 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division Features and Benefits  The optimization of our insulator foot allows more material to be added in the thread portion of the insulator shell. The extra material provides superior resistance to deformation when the spark plug is torqued in the cylinder head. (Deformation of the shell can be directly related to plug failures as the seal is broken between the insulator and the shell, causing misfires.) BoschBrand “C”

6 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division Features and Benefits  Specially designed steel shell. Shell and insulator are mated together with an electro-heat-shrinking process, and then nickel plated. Some manufacturers use zinc plating, but Bosch found that nickel plating prevents plugs from seizing in cylinder heads. Zinc is more susceptible to seizing. You can see the difference. BoschBrand “C”

7 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division Features and Benefits  Electrode seal and Proprietary resistor. A gas tight seal in this location prevents “Blow by” of hot combustion gasses that rob an engine of power. Bosch seals are made of an excusive mixture of graphitized-metal-glass to maintain consistent conductivity under all operating temperatures. This also provides the proper resistive value necessary for reliable engine operation in electronically controlled spark ignition engines. Brand “C” uses a lesser quality, pre-manufactured resistor. BoschBrand “C”

8 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division Features and Benefits  Full length terminal stud and threaded brass terminal nut. Bosch engineers left no detail unchecked when building this plug. Our plug features a full length terminal stud and brass terminal nut for maximum strength. This ensures a solid, vibration free connection while a threaded and crimped brass terminal nut is added for maximum, corrosion free conductivity. Brand “C” uses a lesser design.

9 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division Features and Benefits  Platinum / Iridium Alloy Center and Ground electrodes. Bosch engineers worked to perform “in-service” field tests of several alloys. This collective testing lead to the development of a proprietary Platinum and Iridium alloy which provides superior wear and durability, for a more consistent level of performance over the life of the plug.  Recognizing that this industry, based on location, has large variances in gas btu quality as well as various impurities, the in-service testing provided an extremely challenging operating environment. Bosch did not encounter a single failure or engine shut down during the test.

10 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division Features and Benefits  Platinum / Iridium Alloy Center and Ground electrodes. Bosch’s 100+ year experience manufacturing automotive spark plugs has aided in our challenge to develop a superior industrial plug. Bosch uses an exclusive welding process to attach the Platinum / Iridium alloy. This ensures a secure, fracture and virtually void free weld. You can see the difference between Bosch and Brand “C” in the cross sectioned photos. Bosch Brand “C”

11 Confidential | M. Hallis (AM/MKT3.1) | 5/31/2007 | © 2007 Robert Bosch LLC and affiliates. All rights reserved. Industrial Aftermarket Division Coverage  Bosch spark plugs can be used with confidence in many popular natural gas engines manufactured by Caterpillar, Waukesha and others.  Bosch P/N# 7301 replaces the following competitive plug numbers:  Caterpillar ,  Champion RB77WPCC, KB77WPCC  Waukesha 60999Z, 69919D

Caterpillar Prechamber Combustion Buffer Sensor  Bosch Part Number 7330  Replacement for Caterpillar Part Number  Fits all Caterpillar G3600 Models 12