The Vortec 4800 LR4 is a Generation III small block Chevy V8 truck engine. Displacement is 4.8 L or 293 cu inches engine. It is the smallest of the Generation III Vortec truck engines and was the replacement for the 5.0 L 5000 L30. The LR4 produces 270 horsepower to 295 horsepower and 285 lb·ft, to 305 lb·ft, depending on the model year and application. LR4s are manufactured at St. Catharines, Ontario and Romulus, Michigan.

LR4 applications include the Chevrolet and GMC light truck line, full sized vans and full sized SUV’s.

The Vortec 4800 LY2 is a Generation IV small block V8 truck engine. Like its LR4 predecessor, it gets its displacement from a 96.01 mm bore and 83 mm stroke. The smallest member of the Generation IV Vortec engine family, it is unique in that it is the only member of that family that does not feature either variable valve timing.

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