Pro Series XP Racing Dual Valve Spring Kit

The Skunk2 Pro Series XP (Extra Pressure) Racing Valve Spring Kits are engineered for Honda K-series i-VTEC engines, offering enhanced performance for turbocharged and extreme high-RPM applications. These dual valve springs provide a seat pressure of 100 lbs @ 1.600 in., while maintaining coil bind height for higher lift camshafts. Manufactured from super-clean, chrome-silicone wire milled in Japan, each spring undergoes rigorous processes including heat-treatment, shot-peening, chemical polishing, and a special nitriding process to ensure durability and strength. The dual spring design, with inner and outer springs mated at a slight interference fit and differing frequencies, effectively prevents valve float and maintains valvetrain stability at engine speeds exceeding 11,000 rpm. These springs have been tested on engine dynos, street vehicles, and race tracks. No machining is required for installation. The kit includes 16 dual valve springs. This product fits the following vehicles: 2002-2006 Acura RSX (Base, Type-S), 2004-2008 Acura TSX (Base), 2003-2005 Honda Accord (DX), 2003-2007 Honda Accord (EX, LX), 2007 Honda Accord (EX-L, Special Edition), 2006 Honda Accord (LX Special Edition), 2005 Honda Accord (SE), 2006-2007 Honda Accord (Value Package), 2008 Honda Civic (MUGEN Si), 2002-2011 Honda Civic (Si), 2002-2009 Honda CR-V (EX, LX), 2007-2009 Honda CR-V (EX-L), 2005-2006 Honda CR-V (SE), 2003-2004 Honda Element (DX), 2003-2011 Honda Element (EX), 2004-2011 Honda Element (LX), and 2007-2010 Honda Element (SC).