FOX Factory PS Stabilizer IFP shock internal floating piston — Silver aluminum, CNC machined for consistent damping

The FOX PS Stabilizer IFP 98524173 is a precision-fit internal floating piston (IFP) stabilizer that improves shock consistency and extends service life for vehicle-specific suspension systems.

Built from machined aluminum and finished in a silver/black anodized look, this Fox Shox PS Stabilizer is engineered to separate oil from pressurized nitrogen and reduce cavitation inside the shock body. It’s part of FOX’s Performance Series designed for heavy-duty, motorsport, and off-road applications where durable components and repeatable damping are required.

How does the IFP design improve shock performance?

The internal floating piston (IFP) creates a reliable barrier between oil and high-pressure nitrogen, helping maintain stable damping across a range of temperatures and loads. By preventing gas migration into the oil circuit, the IFP reduces aeration and inconsistent shock behavior during repeated compression cycles.

• Separates oil from nitrogen to reduce cavitation and fade.
• Promotes consistent damping under continuous or heavy use.
• Improves shock response during rapid compression and rebound events.

What materials and machining features set this stabilizer apart?

This Fox part uses a smooth-body aluminum construction with black anodized, CNC-machined components for precision tolerances and corrosion resistance. The durable finish and tight machining reduce wear and support long-term service intervals even in harsh off-road or track conditions.

• Aluminum body for strength and lightweight performance.
• Black anodized CNC machined parts for durability and fitment accuracy.
• Precision tolerances to minimize internal leaks and improve life span.

Which vehicles and repairs is part number 98524173 intended for?

The PS Stabilizer IFP 98524173 is a vehicle-specific replacement component meant for compatible FOX shock models—check fitment guidance before ordering. It’s suited for owners or technicians replacing worn IFP units during rebuilds or upgrading to Performance Series internals for improved shock reliability.

• Designed as a direct-fit service part for specified FOX shocks.
• Common in heavy-duty off-road and motorsport rebuilds and upgrades.
• Fitment varies by vehicle; consult FOX fitment charts or service manual.

How should this stabilizer be installed and maintained?

Installation requires proper shock disassembly, clean fluid handling, and correct nitrogen pre-charge where applicable—this component is intended for professional or experienced DIY service. Maintain seals and fluid cleanliness during rebuilds to preserve the IFP’s performance benefits over time.

• Install during full shock rebuild with recommended FOX fluids and seals.
• Use proper torque specs and cleanliness to avoid contamination.
• Inspect periodically for anodize wear, scoring, or seal damage.

Who is this for: The FOX PS Stabilizer IFP 98524173 suits racers, off-road enthusiasts, technicians, and shops that rebuild or upgrade FOX shocks and require a durable, precision-machined IFP for repeatable damping. If you maintain vehicle-specific FOX suspension, need a heavy-duty service component, or want to reduce cavitation and extend shock life, this part is designed for your rebuild or performance project.