SPOOLOGIC Upgraded Compressor Housing Kit 68mm Billet Wheel

The SPOOLOGIC Upgraded Compressor Housing Kit SL-230-037 fits the GT3788VA turbocharger in 2004.5-2007 Chevrolet Silverado and GMC Sierra 2500 3500 6.6L Duramax LLY/LBZ. Its 68 mm billet compressor wheel and matched housing provide a compressor-side upgrade for a performance rebuild.

Features

• 68 mm billet compressor wheel
• Matched compressor housing and backing plate
• Extended-tip compressor wheel design
• Seals and mounting hardware supplied
• Individually balanced compressor wheel

What's Included

• 1 SPOOLOGIC 68 mm Billet Compressor Wheel
• 1 SPOOLOGIC Compressor Housing
• 1 SPOOLOGIC Backing Plate
• SPOOLOGIC Seals and Mounting Hardware

Fitment

• 2004.5-2005 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LLY
• 2006 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LLY
• 2006-2007 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LBZ

Turbo Compatibility

• Garrett GT3788VA

Compressor Wheel

• Compressor inducer: 68 mm
• Compressor exducer: 88 mm
• Extended tip: 91 mm
• Blade design: 11
• Material: 5-axis CNC-machined billet aluminum

Assembly and Balancing

The compressor wheel is individually balanced. Balancing the completed rotating assembly is recommended best practice after installation. Verify wheel-to-housing clearance and follow the applicable shaft-nut tightening specification.

⚠️ Emissions Notice

Not CARB approved. Not legal for sale or use in the state of California.

⚠️ DIY Product — All Sales Final, No Warranty, No Returns

Every SPOOLOGIC Upgraded Compressor Housing Kit 68mm Billet Wheel is intended for experienced turbo builders and qualified technicians. Inspect the mating components and verify configuration, alignment, and wheel clearances before assembly. All sales are final - no warranty, returns, or exchanges. Confirm compatibility before ordering. See the SPOOLOGIC Warranty Policy for details on parts sold without a warranty.