Skunk2's Ultra kit adds dual valve springs and spring bases to Honda's L15B7 and L15CA 1.5L turbo engines, allowing more camshaft lift than the OEM springs permit and supporting high-lift performance cams. The springs are wound from high-tensile chrome-silicone wire, shot-peened and heat-treated for consistent long-term valve control.
| Type | Ultra dual valve springs with spring bases |
| Material | Chrome-silicone spring wire, shot-peened and heat-treated |
| Installed Height | 1.450 in. |
| Seat Pressure | 83 lbs. |
| Open Pressure | 215 lbs. |
| Coil Bind | 0.926 in. |
| Max Lift | 0.500 in. |
| Fitment | Honda L15B7 / L15CA 1.5L turbo (2016+ Civic 1.5T) |
| Part Number | 313-05-9400 |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
