RB20s

RB20s refers to a series of internal combustion engines produced by the American company General Motors (GM) from 1999 to 2005. These engines are part of GM's RB (Rocket Balanced) family, known for their high performance and reliability. The RB20s engines are available in various configurations, including inline-four, V6, and V8, and are used in a range of vehicles, from compact cars to full-size trucks.

The RB20s engines are characterized by their high compression ratio, which allows for improved fuel efficiency and reduced emissions. They also feature a unique design that includes a rotating assembly (Rocket) that balances the engine's rotating components, reducing vibration and improving overall performance. This design also allows for a more compact engine layout, which is beneficial for vehicle packaging.

The RB20s engines are known for their durability and longevity, with many owners reporting that their engines can last for hundreds of thousands of miles with proper maintenance. They are also praised for their smooth operation and responsive acceleration, making them a popular choice among performance enthusiasts.

The RB20s engines were produced in several variants, including the RB20DET, RB20DOHC, and RB20DOHC V8. The RB20DET is a naturally aspirated engine, while the RB20DOHC and RB20DOHC V8 are turbocharged versions. These engines were used in a variety of GM vehicles, including the Chevrolet Corvette, Cadillac CTS, and GMC Sierra.

In 2005, GM discontinued the RB20s engines in favor of their new LS (LSA) family of engines. However, the RB20s engines continue to be popular among enthusiasts and are often used in aftermarket applications to improve the performance of older GM vehicles.