2004.05 -2005 GM CHEVRY Duramax 6.6 L LLY GT3788VA CompressorWheel+Repair Kit With 360 Thrust Bearing and 2 piece collar System for better Lubrication. Stepped Gap Seal Ring on Compressor side to eliminate Oil Leak problem. Compressor Wheel Inducer:63.5mm Exducer:88mm Fit Turbo Model: Garrett GT3788VA Fit Vehicle: 2004.5-2005 GMC/CHEVRY Duramax 6.6L