A throttle body spacers not required. Throttle body spacer are to increase the volume of the intake manifold to give more area for the air and fuel to mix. They help out alot on carberated engines but arnt worth the money for fuel injected engines and show no gains at all.
i have yet to do it. but its not to hard. take TB off, open the coolant tank ( when car is cool ) to relive pressure, then undo both lines from the TB, then put one line back in to the system, and one off.
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