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4. A requirement with the SMT-6 kit is the use of a two-bar 28-psi MAP sensor. Tapping into the MAP sensor, the SMT-6 can instantly determine when boost is occurring and activate the necessary triggered accessory, which in our case is two extra fuel injectors. Because '01 S-10s didn't come with a MAP sensor, the two bar unit was included in the Vortech supercharger kit and senses boost from the T'ed stock vacuum hoses.