These Scion kits replace all of the vacuum hoses associated with the engine as well as the radiator to overflow tank hose. If you buy this kit and later need to upgrade it to the after market kit, that's not a problem but it will cost $9.    The kit is pre-cut with step by step detailed installation instructions.

each kit

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If your Scion has an after market air intake (any brand)  this kit will fit.  The kit is pre-cut with step by step detailed installation instructions.

This kit replaces all the vacuum lines under the hood except for one. It also replaces the radiator to coolant overflow tank hose. The engine pictured has a carbon fiber cover and an Injen Intake, neither of which are included.  The kit is pre-cut with step by step detailed installation instructions.