Skunk2 Pro XP K-Series Valve Spring Set (K20/K24)

Unlock the full potential of your Honda K Series engine with the Skunk2 Pro Series XP (Extra Pressure) Racing Valve Spring Kits, designed for the 2002-2006 Acura RSX, 2001-2005 Honda Civic Si, and 2004-2008 Acura TSX. These high-performance dual valve springs are the culmination of Skunk2’s extensive racing heritage and engine-building expertise, tailored for turbocharged and high RPM motors. The Pro XP series stands out with its higher seat pressure, ideal for engines that push the boundaries of speed and performance. With a seat pressure of 100lbs at 1.600”, these springs are engineered to accommodate higher lift camshafts while preventing coil bind. Manufactured from premium, super-clean, chrome-silicone wire sourced from Japan, the Pro XP valve springs feature a dual-spring design with inner and outer springs mated through a slight interference fit and differing frequencies to prevent valve float and maintain valvetrain stability beyond 11,000 rpm. Skunk2’s commitment to quality is evident in every step of the manufacturing process. From the North American winding of the springs to the rigorous testing on engine dynos, street, and race tracks, each component is designed to withstand the demands of extreme-lift camshafts and prolonged high-rpm use. The result is a lightweight valve spring that offers superior resistance to load loss under extreme conditions, thanks to a meticulous heat-treating, shot-peening, chemical polishing, and a special nitriding process.