Skunk2 Pro Series XP Dual Valve Spring Set - Honda/Acura K-Series i-VTEC

Skunk2's Pro Series XP (Extra Pressure) racing valve springs raise seat pressure for turbocharged and extreme high-rpm K-series i-VTEC builds, running 100 lbs. at 1.600 in. while preserving coil-bind height for high-lift cams. Wound from super-clean chrome-silicone wire milled in Japan, the dual inner and outer springs prevent valve float and hold valvetrain stability past 11,000 rpm. Sold as a set of 16.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
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Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
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Full details: Shipping Policy · Refund Policy