Product Description
2015-2023 Mustang S550 S8.8'' LSD Spool Kit by SPE Motorsport
Upgrade the strength and consistency of your 2015–2023 Ford Mustang's rear differential with the SPE Motorsport S8.8 LSD Spool Kit. Designed for high-horsepower S550 Mustang applications, this innovative upgrade replaces the limitations of the factory clutch-type limited-slip differential with a spool-style locking configuration that delivers consistent power to both rear wheels.
The factory Ford Super 8.8 differential is a strong platform, but its factory clutch packs can struggle under extreme horsepower and demanding driving conditions. As power increases, maintaining consistent power delivery between the rear wheels becomes increasingly important.
SPE Motorsport engineered this kit to address those limitations using precision-machined billet hardened locking rings and billet Belleville spacers. By changing how loads are transferred through the differential carrier, the system is designed to increase carrier strength by approximately 50% while providing consistent power distribution to both rear wheels.
Whether you're building a high-horsepower Mustang for drag racing, competition, or other demanding performance applications, the SPE S8.8 Spool Kit provides a stronger and more consistent approach to putting power down.
Product Features
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Billet hardened differential locking rings.
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Billet Belleville spacers.
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Spool-style differential configuration.
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Designed to provide consistent power delivery to both rear wheels.
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SPE-engineered design increases differential carrier strength by approximately 50%.
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Drop-in installation design.
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Installs through the differential cover without removing the differential carrier.
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No gear setup required when retaining the existing gear ratio.
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Designed for high-horsepower applications exceeding 700 HP.
Vehicle Fitment
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2015–2023 Ford Mustang GT (S550)
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Ford Super 8.8 differential equipped with a compatible clutch-type carrier.
Important Fitment Information
This kit DOES NOT fit Performance Package differentials equipped with the factory Torsen differential. The Torsen carrier does not use the clutch-plate configuration required for this kit.
Verify your differential configuration before ordering.
Why Upgrade Your Mustang's Differential?
Factory limited-slip differentials rely on clutch packs to transfer power between the rear wheels. Under high-power conditions, these components can become a limitation.
The SPE Motorsport S8.8 Spool Kit changes the differential's operation to provide consistent power to both rear wheels. This can be especially beneficial for high-horsepower applications where predictable power delivery and differential strength are important.
Available at Drift American: Your source for Mustang drift parts, performance upgrades, suspension components, and drivetrain solutions.
