Garrett GBC20-300 Club Line Turbocharger 0.55 O/V T25 / 5-Bolt - Internal WG

The Garrett GBC20-300 Club Line Turbocharger features a 0.55 A/R turbine housing, offering a good balance for improved spool and top-end power on many smaller displacement engines. This turbocharger is built with a T25 inlet flange and a 5-bolt exhaust outlet, making it a popular choice for compact engine bays and custom turbo setups. The integrated internal wastegate simplifies plumbing and helps regulate boost pressure effectively.

Garrett has incorporated a durable cast-iron turbine housing designed to withstand high exhaust gas temperatures. The compressor side utilizes a forged-milled aluminum alloy for its wheel, which is both lightweight and strong, contributing to quicker response times. This turbocharger is part of Garrett's Club Line series, aimed at enthusiasts looking for a well-built, reliable turbocharger for performance applications where a specific fitment isn't the primary concern, but rather a solid foundation for building power. The 52mm compressor wheel diameter and 44.5mm exducer diameter are key specifications that contribute to its airflow characteristics.

When installing this turbocharger, ensure your engine's cooling and oiling systems are in excellent condition, as turbochargers rely heavily on clean oil for lubrication and cooling. Proper exhaust manifold and downpipe fabrication will be necessary to connect to the T25 inlet and 5-bolt outlet. Because this unit has an internal wastegate, you'll need to ensure the actuator is correctly plumbed to a boost source. Remember, this turbocharger is not CARB approved and cannot be shipped to California.