Skunk2 Ultra Valve Springs and Spring Base Kit - Honda K20C1 / K20C4

$340.00 USD

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SKU: 313-05-9100


  • 10th Gen Honda Civic Type-R
  • 11th Gen Honda Civic Type-R
  • 10th Gen Honda Accord
  • 5th Gen Acura Integra Type-S
  • 2nd Gen Acura TLX
  • 3rd Gen Acura RDX

All Skunk2 valve springs control are made from super-clean high tensile strength chrome-silicone wire, shot peen stress relieved, and heat-treated to provide consistent and reliable long term performance.

Skunk2 Valve springs allow for improved engine valve control and additional cam lift beyond what is possible with OEM valve springs, and are required when running High-Lift performance camshafts.


  • Installed Height: 1.450”
  • Seat Pressure: 83 LBS
  • Open Pressure: 215 LBS
  • Coil Bind: .926”
  • Spring Rate: 269 LBS/IN
  • Max Lift: .500”
  • Note: Spring base thickness – Intake .380” / Exhaust .300”

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