The SPOOLOGIC SL-100-051 is a brand new, direct drop-in Stock Plus Performance Turbocharger (Federal Emissions) for 2001-2004 Chevrolet Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD trucks with the 6.6L Duramax LB7. Built on the IHI RHG6 fixed-geometry platform — the same architecture as your factory turbo — upgraded with an extended-tip billet-style compressor exducer, a ceramic-coated hot side, upgraded internals, and your choice of compressor housing finish — a no-tuning-required upgrade that delivers a modest airflow gain, better EGT control, and a fresh brand new turbo over a factory or remanufactured RHG6.

This is the no-tuning, no-headache upgrade for the LB7 owner who wants a little more out of the truck without touching the ECM. The extended-tip exducer sits inside the factory calibration’s airflow window, so it runs on the factory tune with no supporting modifications required. Expect a modest airflow and EGT improvement over a healthy factory turbo — a mild refinement, not a horsepower-tier upgrade. Exact gains depend on what else is done to the truck — injectors, tuning, intake, and exhaust all stack on top.

60.6/82/87.7mm Extended-Tip Compressor Wheel

The SL-100-051 keeps the factory 60.6mm inducer and 82mm base exducer — the same sizing IHI specced for the LB7 — and adds an 87.7mm extended-tip exducer. The extra tip length picks up a bit more airflow at the top of the compressor map without changing the wheel’s low-end behavior or how the truck spools. Sized to stay inside the factory ECM’s airflow window so no tuning is required.

• Inducer: 60.6mm
• Exducer: 82mm base / 87.7mm extended-tip outer diameter
• Blade count: 11, factory-style
• Balance: High-speed VSR balanced as part of the complete CHRA assembly

Factory-Sized 68/62mm Turbine Wheel

The SL-100-051 keeps the factory-sized 68/62mm turbine wheel — unchanged from the stock LB7 spec — paired with the factory-spec turbine housing and wastegate actuator. Spool characteristics and boost response stay exactly the way you’re used to. Plug-and-play, no tuning, no boost fooler, and no other supporting parts required.

• Turbine inducer: 68mm
• Turbine exducer: 62mm
• Blade count: 11, factory-style
• Wastegate actuator: New, tested on every unit, matched to the factory RHG6 wastegate calibration
• Best for: Stock and near-stock LB7 trucks, daily drivers, tow rigs, work and fleet trucks, restoration builds

If you’re running a tune and want a bigger 6+6 billet compressor with an 11-blade billet turbine and the upgraded internals sized for real horsepower, step up to the SL-100-052 Stage 1.

Upgraded Internals — Standard

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

• 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
• New wastegate actuator — tested on every unit, matched to the factory RHG6 wastegate calibration for accurate boost control
• High-speed VSR balancing — smooth, dependable operation and longer bearing life

Ceramic Coated Turbine Housing, Center Section & Pedestal

SPOOLOGIC ceramic coats the turbine housing, the center section (CHRA), and the pedestal on the SL-100-051. 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

Choose Your Finish

Use the dropdown above to select your compressor housing finish. The 60.6/82/87.7mm extended-tip compressor wheel, 68/62mm factory-sized turbine wheel, ceramic-coated hot side, upgraded internals, and complete install kit are standard on every variation.

Compressor Housing Finish

• 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

What’s Included

• 1 SPOOLOGIC Stock Plus RHG6 turbocharger — brand new, VSR balanced
• 1 Ceramic-coated turbine housing (installed)
• 1 New wastegate actuator (installed, tested)
• 1 SL-310-021 turbo gasket kit
• 1 New oil feed line
• 1 New oil drain line
• 1 Turbo-to-catalytic-converter clamp

Features

• Direct drop-in fit for 2001-2004 6.6L Duramax LB7 (Federal Emissions)
• Built on the IHI RHG6 fixed-geometry platform — same architecture as factory
• 60.6/82/87.7mm extended-tip compressor wheel, 11-blade factory-style
• 68/62mm factory-sized turbine wheel with factory-spec wastegate actuator — plug-and-play, no tuning required
• Modest airflow and EGT gain over a healthy factory turbo — no tuning required to benefit
• Ceramic coated turbine housing, center section, and pedestal — reduces under-hood heat and protects the CHRA from oil coking
• New wastegate actuator, tested on every unit
• Extreme duty journal bearings, 360-degree thrust bearing, step gap seal rings, VSR balanced
• Raw, black, or red compressor housing finish
• 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)

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, 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.