Skunk2 Pro Series Honda/Acura K-Series i-VTEC XP Valve Spring Set (Dual Springs) 2005-acura-rsx-esi4359491 Replace original X1 Series regulator

Replace original X1 Series regulator internals with the conversion kit of your choice (Part #'s 13013

5T or 2017-2020 Civic Si is the addition of flow through your intercooling system

Skunk2 employs the same design and manufacturing methods for all of its Fine Tuning accessories as it does for its top-of-the-line racing components

Radium Engineering M10x1mm Female to 1/8NPT Male Fitting

Skunk2 Pro Series Honda/Acura K-Series i-VTEC XP Valve Spring Set (Dual Springs) 2005-acura-rsx-esi4359491 Replace original X1 Series regulatorSkunk2 is proud to introduce its Pro Series XP (Extra Pressure) Racing Valve Spring Kits for the Honda K series i VTEC engines. Each kit includes Skunk2's high quality race proven dual valve springs that are the result of nearly two decades of racing and engine building experience. 'XP' features a higher seat pressure for turbocharged and extreme high RPM motors. This spring has a seat pressure of 100lbs @ 1. 600 in. while keeping the coil bind height