The Garrett GBC20-300 turbine housing wastegate assembly kit is a T25, 5-bolt turbine housing with a 0.55 A/R ratio, supplied as a wastegate assembly kit under Garrett's GBC20-300 designation. It is intended for turbocharger applications that require a T25 5-bolt turbine housing and the stated A/R specification, providing the housing and wastegate components needed for installation into compatible systems.
Garrett GBC20-300 0.55 A/R O/V T25/5-Bolt Turbine Housing Wastegate Assembly Kit