Ford Expedition Explorer F150 F250 F350 Lincoln Navigator Mercury Moutaineer TRITON V8 4.6 5.4 SOHC 3-VALVE Left Right Timing Chain Tensioner Maintaining optimal chain tension throughout the revolutions per minute range Utilizes a unique hydraulic pressurizing mechanism that efficiently dampens timing chain vibration All of our tensioner adjusters or hydraulic tensioners are produced under strictly observed quality under highest ISO 9001:2000 international standards Designed to meets or exceeds OE performance requirements Please see description details below to ensure the fitment