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The Tundra’s Acoustically Controlled Induction System

Like the rose, a variable length intake manifold by any other name would still increase horsepower and torque. Toyota’s name for this technological rose, and the system used in all three Tundra engine options, is Acoustically Controlled Induction System. In the simplest terms, the ACIS supplies a blast of air, like a tiny supercharger, into the combustion chamber under specific driving conditions. How sweet.

Tundra 5.7 engine cutaway photo

Here’s a cutaway of the 5.7 V8. Note the tag for ACIS in the upper right hand corner.

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