The GDP Tuning GDP210023 Shift-On-The-Fly Switch allows you to change engine profiles in your 2008-2010 Ford 6.4L Powerstroke. This switch works conjunction with the GDP Support Pack on the NGauge and Ez Lynk® AutoAgent™ Platform. FEATURES: Designed For Plug & Play Installation For Use With GDP Support Packs On Ez Lynk® Platform Note: Switch only. Support Pack not included. AutoAgent™ is a trademark of Ez Lynk® GDP Tuning is in no way affiliated with Ez Lynk® Customers with technical support related questions or concerns should contact GDP.