Brian Crower BC0400S Single Valve Spring & Steel Retainer Kit for Mazda MZR/Ford

Vehicle Fitment

• 2003-2013 Mazda 3 (2.3L/2.5L)
• 2006-2013 Mazda 6 (2.3L/2.5L)
• 2006-2010 Ford Focus (2.3L/2.5L)
• 2006-2011 Ford Fusion (2.3L/2.5L)
• 2006-2011 Mercury Milan (2.3L/2.5L)
• 2006-2011 Lincoln Zephyr (2.3L/2.5L)

Features

• Designed for high RPM applications, supporting engine speeds over 8,000 RPM
• Single spring configuration (BC1400) for optimal performance
• Springs wound from high-grade chrome silicone alloy by PAC Racing
• Retainers CNC-machined from high-strength steel for enhanced durability
• Spring seat compatible with OEM components
• Free length of 1.788" with a seat pressure of 86 lbs
• Open pressure of 190 lbs at 1.000" lift
• Coil bind height of 0.835" to prevent spring binding at high RPMs

Specifications

• Spring Type: BC1400 Single
• Material: Chrome silicone alloy (springs), high-strength steel (retainers)
• Free Length: 1.788"
• Seat Pressure: 86 lbs
• Open Pressure: 190 lbs at 1.000" lift
• Coil Bind Height: 0.835"
• Retainer Part Number: BC2400S
• Spring Seat: OEM
• Net Cam Lift: 0.480" / 12.19mm

Included Components

• 1x Single Valve Springs (Set)
• 1x Steel Retainers (Set)

Product Description

The Brian Crower BC0400S Single Valve Spring and Steel Retainer Kit is engineered for high-performance applications in Mazda MZR and Ford Duratec 2.3L and 2.5L engines. Designed to withstand engine speeds exceeding 8,000 RPM, this kit ensures superior valve control and reliability under extreme conditions.

The BC1400 single valve springs are wound from high-grade chrome silicone alloy by PAC Racing, featuring proprietary processing procedures for consistent pressures. The retainers are CNC-machined from high-strength steel, offering enhanced durability and reduced weight. The kit is compatible with OEM spring seats, making installation straightforward.

With a free length of 1.788" and a seat pressure of 86 lbs, the springs provide the necessary force to keep the valves securely seated. The open pressure of 190 lbs at 1.000" lift and a coil bind height of 0.835" prevent spring binding at high RPMs, maintaining engine performance and longevity.