Skunk2's Alpha valve spring set upgrades the K-series and F-series DOHC VTEC valvetrain with dual inner and outer springs wound from super-clean chrome-silicone wire milled in Japan. Mated at a slight interference fit and tuned to differing frequencies, the springs resist valve float and hold valvetrain stability at engine speeds above 10,000 rpm. Each set covers a full head of 16 valves.
| Type | Alpha Series dual valve spring set (inner and outer) |
| Material | Chrome-silicone wire |
| Open Pressure | 220 lbs. at 1.100 in. |
| Seat Pressure | 60 lbs. at 1.600 in. |
| Coil Bind | 1.000 in. |
| Quantity | Set of 16 (full head) |
| Part Number | 311-05-1380 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2005 | Acura | RSX | Base |
| 2002-2006 | Acura | RSX | Type-S |
| 2004-2008 | Acura | TSX | Base |
| 2003-2005 | Honda | Accord | DX |
| 2003-2007 | Honda | Accord | EX |
| 2007 | Honda | Accord | EX-L |
| 2003-2007 | Honda | Accord | LX |
| 2006 | Honda | Accord | LX Special Edition |
| 2005 | Honda | Accord | SE |
| 2007 | Honda | Accord | Special Edition |
| 2006-2007 | Honda | Accord | Value Package |
| 2002-2010 | Honda | Civic | Si |
| 2002-2009 | Honda | CR-V | EX |
| 2007-2009 | Honda | CR-V | EX-L |
| 2002-2009 | Honda | CR-V | LX |
| 2005-2006 | Honda | CR-V | SE |
| 2003-2004 | Honda | Element | DX |
| 2003-2011 | Honda | Element | EX |
| 2004-2011 | Honda | Element | LX |
| 2007-2010 | Honda | Element | SC |
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.
