Garrett Boost | Club Line turbochargers are high performance journal bearing products in a cost effective price range. GBC combines modern, high flowing aerodynamics with a robust journal bearing rotating group to make a powerful and affordable turbocharger. 58mm compressor inducer | 76mm compressor exducer Outline interchangeable with GBC37-900 400 –700 horsepower capability Billet compressor wheel with extended tip design for higher pressure ratios Journal bearing rotating group with 360-degree thrust bearing Machined boost signal port with installed plug Modern turbine wheel aerodynamics Oil-cooled centre housing