SPOOLOGIC Upgraded Compressor Housing Kit 68mm Billet Wheel

The SPOOLOGIC Compressor Housing Kit — SL-230-037 pairs a 68 mm billet compressor wheel with a matching housing for LLY and LBZ Duramax applications. The supplied backing plate, seals, and hardware support a compressor-side upgrade while the turbocharger is disassembled for service.

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 Applications

• Garrett GT3788VA

Compressor Wheel

• Inducer: 68 mm
• Base exducer: 88 mm
• Extended-tip diameter: 91 mm
• Blade count: 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

This SPOOLOGIC turbocharger repair product is intended for experienced turbo builders and qualified technicians. Proper installation requires suitable tools, careful inspection, and correct assembly. All sales are final—no warranty, returns, or exchanges. Confirm compatibility before ordering. See the SPOOLOGIC Warranty Policy for details on products sold without a warranty.