Skunk2 02-06 RSX / 06-11 Civic Si Pro Series XP Valve Springs

• Seat Pressure: 100 lbs at 1.600"
  
• Open Pressure: 255 lbs at 1.100"
  
• Coil Bind: 0.890"
  
• Max Lift: 0.680"
  
• Includes 16 dual valve springs.
  
• Higher seat pressure for turbocharged and extreme high RPM motors.
  
• Manufactured exclusively from super-clean, chrome-silicone wire milled in Japan.
  
• Maintain valvetrain stability at engine speeds in excess of 11,000 rpm.
  
• Engineered to handle the demands of extreme-lift camshafts operating at prolonged, high-rpm use.
  
• Heat-treated, shot-peened, and chemically polished for strength and durability.
  

Manufactured from the best materials available, Skunk2 valvetrain components provide exceptional performance, reliability, and quality. These components remain standard-issue on each Skunk2 vehicle that we build and support.

Must Use Skunk2 312-05-0010 (Spring Bases) to Install Dual Springs in Single Spring K Series Heads or Install These Springs in F20C/F22C Engines