What is a 16G?

These are Mitsubishi racing turbos, larger than stock. 16G is the short name for the Mitsubishi TD05-16G, the 20G is a Mitsubishi TD06-20G, and the 25G is a Mitsubishi TD06/07 hybrid turbo.

The 16G is a popular upgrade from the stock DSM turbo. It has been said that this turbo is designed for quick spoolup, which improves streetability and performance in application such as autocross.

The 20G is a much larger unit and is generally reserved for serious drag racers. Once the biggest turbo available, the 20G is now considered a "medium" turbo upgrade at best.

The 25G is a combination turbo based on the 20G. Similar to the "big" 16G, it has "mismatched" compressor and turbine wheels: the turbine wheel is TD06 (stock 20G) while the compressor wheel is bigger. 25Gs very new and extremely hard to find.

Read the Top Ten FAQ for lots of technical information on these and other turbos.