Skunk2 60lbs ALPHA Valve Spring Set K20A2 A3 Z1 Z3 K24A1 A2 A4 A8 Z1 F20C F22C 311-05-1380

Part Fits Engines: 
Acura K20A2, Z1
Acura K24A2
Honda K20A3, Z3
Honda K24A1, A4, A8, Z1
Honda F20C, F22C

2002 - 2006 Acura RSX (Base, Type-S)
2004 - 2008 Acura TSX (Base)
2006 - 2010 Honda Civic Coupe (Si)
2002 - 2005 Honda Civic Hatchback (Si)
2007 - 2010 Honda Civic Sedan (Si)
2003 - 2008 Honda Element (2WD EX, 4WD EX)
2004 - 2008 Honda Element (2WD LX, 4WD LX)
2003 - 2004 Honda Element (2WD DX, 4WD DX)
2000 - 2009 Honda S2000 AP1 AP2

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

Seat Pressure: 60 lbs at 1.600”
Open Pressure: 220 lbs at 1.100”
Coil Bind: 1.000”

Please note: When using Skunk2 Titanium Retainers on 2004 and newer engines, pre-2004 keepers (cotters) must be used (Honda P/N 14781-PR7-A01). Pre-2004 keepers can be identified by the absence of marks along the top edge (2004 and newer keepers feature laser-etched marks along the top edge). For applications where 2004 and newer keepers are used, Skunk2 Titanium Retainers must be used. Proper retainer/keeper selection is important due to varying angle ratios between earlier and later keeper designs. Use of improper retainers and/or keepers may result in potential engine damage.

Manufactured exclusively from super-clean, chrome-silicone wire milled in Japan, Skunk2’s Alpha Valve Springs for Honda/Acura K-series VTEC engines are a product of the company’s years of racing and engine building experiences. By using inner and outer springs mated together through a slight interference fit and with differing frequencies, Alpha Valve Springs are able to prevent valve float and maintain valvetrain stability at engine speeds in excess of 10,000 rpm.

Skunk2 designs, develops, and tests its entire valvetrain lineup in-house to ensure superior quality and maximum performance gains. During development, each valvetrain component is tested both on the dyno and the road, including 11,000 rpm drag racing engines and 17,000 rpm superbikes. Manufactured from the best materials available, Skunk2 valvetrain components provide exceptional performance, reliability, and quality and remain standard-issue on each Skunk2 vehicle that we build and support.