The heart of this kit is our mechanical water pump seal. You can trust our seals to last! Changing the oil seal behind the mechanical seal is a must so we included our viton replacement unit. Installing the mechanical seal can be very tricky so we machined a perfectly sized seal driver to make installation a breeze. Also, our billet water pump impeller will last much longer than the cheap plastic stock impeller. Lastly a new cover o-ring will prevent any leaks. This kit will get you back up and running in no time at a fraction of the cost of dealer parts