The SPOOLOGIC SL-100-052 is a brand new Stage 1 Performance Turbocharger (Federal Emissions) for 2001-2004 6.6L Duramax LB7 trucks. It’s built on the IHI RHG6 fixed-geometry platform — the same factory turbo on your truck — upgraded with a larger 6+6 billet compressor wheel, a larger turbine wheel, ceramic-coated hot side, your choice of compressor housing finish, and a stack of internal upgrades you don’t get on a factory drop-in.

This is the LB7 Stage 1 for the owner who wants real airflow and real horsepower headroom — not just a factory replacement. Bolt this turbo on and go: same up-pipes, same down-pipe, same OEM plumbing. Every SPOOLOGIC turbo is built brand new — never remanufactured — and backed by a 1-Year Limited Warranty.

⚠ CUSTOM TUNING IS RECOMMENDED — READ BEFORE YOU BUY

Custom tuning is highly recommended to get the full potential out of this turbo. The SL-100-052 will physically bolt up and run on the factory tune because it’s built on the same IHI RHG6 platform as your OEM turbo — but the factory calibration is written for the factory wheels. It does not know how to take advantage of the larger 6+6 billet compressor, the extended-tip exducer, or the upgraded internals. You leave a meaningful amount of airflow, response, and top-end on the table without a tune.

To unlock what this turbo was built to do, plan on a custom tune from a qualified LB7 Duramax tuner. SPOOLOGIC does not supply, write, sell, or assist with custom tunes — please line up your tuning shop before the install if you want the truck to perform the way this turbo was designed to.

Choose Your Compressor Housing Finish

Use the dropdown above to select your compressor housing finish. The 63/86.5/90.7mm 6+6 billet compressor wheel, 69.4/67.5mm turbine wheel, ceramic-coated hot side, and complete install kit are standard on every finish option — only the compressor housing look changes.

• Raw — bead-blasted satin natural aluminum finish; no coating, just clean bare metal
• Black — deep gloss black powder coat — baked-on, far more durable than paint, won’t chip from heat cycling, and won’t fade
• Red — high-gloss red powder coat — baked-on, far more durable than paint, won’t chip from heat cycling, and won’t fade

Upgraded Internals — Standard

Every SPOOLOGIC turbo is assembled with upgraded internal components that go beyond a basic factory-style replacement:

• Wastegate actuator — new and tested on every unit, matched to the RHG6 wastegate for accurate boost control at the higher airflow this turbo supports
• Extreme duty journal bearings — premium bronze-alloy bearings machined to tighter tolerances with improved oil groove geometry, maintaining the precise oil film that keeps the turbo shaft centered at 100,000+ RPM — even under higher heat and shaft loads
• 360-degree thrust bearing — added strength and load capacity over the factory 270-degree bearing, better at handling boost-driven thrust loads
• Step gap seal rings — improved sealing performance, less blow-by past the CHRA
• High-speed VSR balancing — smooth, dependable operation and longer bearing life

63/86.5/90.7mm 6+6 Billet Compressor Wheel

The SL-100-052 uses a 5-axis CNC-machined forged billet aluminum compressor wheel with a 6+6 blade geometry — six full main blades with six splitter blades — a meaningful step up from the factory 60.6mm wheel. Capped with a 90.7mm extended-tip exducer for additional airflow on the back side.

• Inducer diameter: 63mm
• Exducer diameter: 86.5mm base / 90.7mm extended-tip outer diameter
• Blade count: 6+6 — six full main blades with six splitter blades
• Material: 5-axis CNC-machined forged billet aluminum

69.4/67.5mm Turbine Wheel

Larger than the factory turbine on both sides to keep up with the airflow gains on the cold side. Matched and balanced to drive the Stage 1 compressor cleanly without choking the top end.

• Turbine inducer: 69.4mm
• Turbine exducer: 67.5mm
• Blade count: 11

Power Support

The SL-100-052 is built to cleanly support up to ~600-625 rwhp when paired with proper tuning, fueling, and supporting modifications. Remember: a turbo doesn’t make power on its own — tuning and fueling make power, and the turbo’s job is to support what the engine is producing. The Stage 1 is sized to keep up with mild-to-moderate tunes, larger injectors, and supporting mods without surging, choking, or overspeeding.

Ceramic Coated Center Section, Turbine Housing & Pedestal

SPOOLOGIC ceramic coats the turbine housing, the center section (CHRA), and the pedestal on the SL-100-052. This isn’t high-temp paint — it’s a true thermal barrier rated for the 1,600°F+ surface temperatures a diesel turbine sees under sustained load. The real, measurable benefits:

• Drops turbine housing surface temps 33-50% — far less radiant heat dumped into the engine bay, which protects wiring harnesses, oil lines, hoses, and surrounding components from long-term heat damage
• Reduces post-shutdown heat soak into the CHRA and bearing oil — the #1 cause of premature turbo failure is oil baking on the bearing journals after shutdown, and the coating interrupts the radiant feedback loop that causes it
• Retains exhaust energy in the gas stream — keeping heat in the exhaust where it belongs (driving the turbine wheel) instead of soaking into the housing
• Pedestal coating — the pedestal sits between the turbine housing and the block; coating it cuts the heat path into the engine valley
• Corrosion and thermal-fatigue resistant — cast iron scales, pits, and cracks over years of heat cycling; the ceramic barrier protects all three parts for the long haul

Features

• Direct upgrade for 2001-2004 6.6L Duramax LB7 (Federal Emissions)
• Built on the IHI RHG6 fixed-geometry platform — same architecture as factory
• 63/86.5/90.7mm 6+6 billet extended-tip compressor wheel
• 69.4/67.5mm 11-blade turbine wheel
• Sized to cleanly support up to ~600-625 rwhp with proper tuning, fueling, and supporting mods
• Ceramic coated turbine housing, center section, and pedestal
• Choice of Raw, Black, or Red compressor housing finish
• New wastegate actuator, tested on every unit
• Extreme duty journal bearings, 360-degree thrust bearing, step gap seal rings, VSR balanced
• SL-310-021 turbo gasket kit, new oil feed line, new oil drain line, and turbo-to-catalytic-converter clamp included
• No core charge — ever
• Built brand new, never remanufactured

Fits 2001-2004 6.6L Duramax LB7

• 2001 – 2004 Chevrolet Silverado GMC Sierra 2500 / 3500 6.6L Duramax LB7

Turbo Applications

• Direct upgrade for factory IHI RHG6 (2001-2004 6.6L Duramax LB7, Federal Emissions), Stage 1 billet upgrade

Replaces Factory OEM Part Numbers

• 1045837
• 2905769000
• 8973077110
• 8973077111
• 97307711
• 97720748
• BD1045837
• FPE-LB7-63

⚠ Not For Sale In California

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

1-Year Limited Warranty

Every SPOOLOGIC turbocharger is covered by a 1-Year Limited Warranty against defects in materials and workmanship from the date of purchase. Warranty coverage requires that the unit first be shipped back to SPOOLOGIC for inspection. If SPOOLOGIC determines the failure was caused by a defect in materials or workmanship, the turbocharger will be repaired or replaced at SPOOLOGIC’s discretion. Warranty does not cover damage from foreign object debris, oil starvation, contaminated oil, extended oil change intervals, over-boosting, over-fueling, tuning beyond the turbo’s rated operating range, improper installation, use outside the listed fitment, cosmetic wear, coating discoloration, or normal heat cycling marks. Warranty does not cover labor, shipping, towing, downtime, or any other costs outside the turbocharger itself.