The SPOOLOGIC SL-100-031 is a brand new, direct drop-in factory replacement for the large rear-mounted low pressure (atmospheric) turbo on 2008-2010 Ford F-250, F-350, F-450, and F-550 Super Duty trucks with the 6.4L Powerstroke V2S compound twin-turbo system. Built to restore factory boost response, throttle, and drivability to a 6.4L truck running a tired, sticking, or failed factory LP turbo — without changing the character of the truck.

This is a true stock replacement, not a performance upgrade. It’s the right turbo for the owner whose LP turbo has failed on a high-mileage 6.4L but whose HP side is still healthy — no need to replace both when only one has quit. Every SPOOLOGIC turbo is built brand new — never remanufactured — and backed by a 1-Year Limited Warranty.

6.4L V2S Compound Twin-Turbo System — How It Works

The 6.4L Powerstroke runs a sequential V2S compound twin-turbo system — the most complex factory turbo setup Ford ever put on a diesel. A small front-mounted high pressure (HP) variable-geometry turbo spools first for off-idle response, feeding compressed air into the inlet of a larger rear-mounted low pressure (LP) atmospheric turbo as boost builds. At higher RPM and load, the HP turbine acts more like a diffuser while the LP turbo — the unit this SKU replaces — takes over the bulk of the airflow duty. Both turbines run off the same exhaust stream, just in reverse order from the compressor side.

Compressor Wheel

The SL-100-031 uses a factory-spec cast aluminum compressor wheel — the same OE-style geometry the 6.4L low pressure turbo left the factory with. Keeps the truck’s stock character with no driveability changes and no boost increase over factory.

• Compressor inducer: 64.5mm
• Compressor exducer: 88mm
• Material: cast aluminum, factory V2S low pressure spec

Turbine Wheel

Factory-spec 10-blade turbine wheel in a wastegated housing, matched to the compressor geometry for proper spool and factory drive pressure on the atmospheric side of the compound system.

• Turbine blade count: 10
• Housing: wastegated, factory V2S low pressure spec

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
• High-speed VSR balancing — smooth, dependable operation and longer bearing life

What’s Included

• 1 SPOOLOGIC Stock Low Pressure turbocharger — brand new, VSR balanced

Features

• Direct drop-in fit for 2008-2010 6.4L Powerstroke Super Duty trucks — low pressure position only
• Factory-spec cast aluminum compressor wheel — 64.5/88mm, no driveability changes
• Restores factory boost response, throttle, and drivability to a worn or failed low pressure turbo
• Extreme duty journal bearings, 360-degree thrust bearing, step gap seal rings, VSR balanced
• True stock replacement — no tune required, no supporting mods, no boost increase over factory
• No core charge — ever
• Brand new, backed by a 1-Year Limited Warranty

Fits 2008-2010 6.4L Powerstroke

• 2008 – 2010 Ford F-250 / F-350 / F-450 / F-550 Super Duty 6.4L Powerstroke

Turbo Applications

• Low pressure (rear, atmospheric) side of the 6.4L V2S compound system only — pairs with a factory or SPOOLOGIC high pressure VGT (SL-100-034 stock or SL-100-032 stock plus)
• Replaces factory V2S low pressure turbo, 2008-2010 6.4L Powerstroke

Replaces Factory OEM Part Numbers

• 177100
• 479514
• 479523
• 8C3Z-6K682-A / 8C3Z6K682A
• 8C3Z-6K682-AARM / 8C3Z6K682AARM
• 8C3Z-6K682-ERM / 8C3Z6K682ERM
• TC-11-RM / TC11RM

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.