FERREA S10181 Dual Valve Springs for FORD Mustang GT (S550 / S650) / FORD F-150 (Mk13 / Mk14)

Description FERREA S10181 Dual Valve Springs for FORD Mustang GT (S550 / S650) / FORD F-150 (Mk13 / Mk14)

The FERREA S10181 valve spring is engineered for the Ford Coyote 5.0L DOHC 32-valve engine and designed as a dual PAC-enhanced high-lift spring suitable for street and strip performance. It provides stable valve control at elevated RPM and is processed to deliver premium operational consistency under demanding conditions.

• Dual PAC-enhanced construction for high-lift applications
• Optimized for street and strip performance use
• Engineered for consistent operation at elevated RPM
• Requires use of dedicated Ferrea titanium retainers and seat locators

Specifications:

• Engine Application: Ford Coyote 5.0L DOHC 32 Valves
• Type: Dual Spring – PAC Enhanced High Lift
• Outside Diameter: 0.806 / 1.102 in
• Inside Diameter: 0.580 / 0.806 in
• Seat Pressure: 85 lbs @ 1.800 in
• Open Pressure: 305 lbs @ 1.100 in
• Rate: 315 lbs/in
• Coil Bind: 1.060 in
• Maximum Net Lift: 0.700 in
• Required Components: Ferrea Titanium Retainer E11149, Ferrea Spring Seat Locators SL1178 (Hat Seal) and SL1170