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“ISUZU GIGA” series of new heavy duty commercial vehicles introduced in Japan in November 1994 are equipped with new V-type, naturally aspirated PE series engines. The PE series engines supersede PD series which has been well accepted in the markets domestic and abroad. The new series has been designed to meet Japan's new 1994 exhaust emission regulations while achieving high output power, low weight, good fuel economy, and high reliability. One outstanding feature of the PE engines is the use of dry liners which few other V engines have. This has made it possible to accommodate increase bore size and increase engine displacement by 14 % while maintaining the relatively short bore pitch of 146 mm. PE engine is in fact a high output engine with the smallest weight in class. The series includes V8, V10 and V12 engines ranging in output from 210 kW to 331 kW, the latter being Isuzu's most powerful engine. Six models differing in output power are available.