Our OEM Timing Set Includes: - Timing Chain - Timing Chain Guide - Tensioner - Sprocket - Cam Gear / Phaser (Also Sold Separately) Rear Main Seal available for sale separately It is recommended to replace tensioners anytime the cam is replaced. They are made of plastic and do fatigue over time. The chain is not known for stretching but it does happen with higher mileage engines so it's never a bad idea to replace chain as well. We sell the whole kit together because you probably should replace it all anyway. DON'T FORGET YOUR PHASER LIMITER OR LOCKOUT AND TOOL!
