The Camshaft Variable Valve Timing Solenoid or VVT Solenoid control the engine's cam shafts on your 5.4 or 4.6 V8 Triton engine. When the factory VCT solenoids fail it can lead to poor fuel economy, a check engine light (CEL), and rough running conditions on your F-150, Expedition, or other vehicle. Fits the following models: 2005-2014 Expedition 5.4L 2006-2010 Explorer 4.6L 2007-2010 Explorer Sport Trac 4.6L 2004-2010 F-150 5.4L 2009-2010 F-150 4.6L 2005-2010 F-250 Super Duty 5.4L 2005-2010 F-350 Super Duty 5.4L 2005-2010 Mustang 4.6L 2006-2010 Mountaineer 4.6L 2006-2010 Mark LT 5.4L 2006-2014 Navigator 5.4L ONLY FITS MODELS WITH 1 3/4" Camshaft Seal. A 1 3/4" camshaft seal is easy to identify, the hole for the VCT Solenoid is offset and NOT in the center of the camshaft seal. Kit Includes: 8L3Z-6M280-B - 2x VCT Solenoids 3L3Z-6C535-AA - 2x Camshaft Seals 2x VCT Solenoid screws Replaces part#: 8L3Z-6M280-B, 8L3Z6M280B, 8L3Z 6M280 B, 917-200, 3L3Z 6C535 AA, 3L3Z-6C535-AA This is a compatible replacement part manufactured by AA Ignition. This camshaft solenoid kit is NOT a genuine OEM part. Vehicle makes and their associated vehicle models are registered trademarks of their respective owners. These trademarks and part numbers are used in this listing only to identify the vehicles this camshaft solenoid kit fits. AA Ignition is a registered trade mark of GWA Auto Parts Inc.