Twostage resonance intake manifold

Porsche engineers love a long, flat torque curve. To help them achieve that aim, the Boxster and Boxster S feature a large intake manifold and revised exhaust manifolds—including high-performance headers on the Boxster S. The twin plenum chambers are connected via parallel pipes, one of which houses a valve. The engine management system uses this valve to alter the internal geometry and match this frequency to the current valve speed for improved cylinder charging.

The results are higher torque at low rpm, a flatter torque curve and more power at high rpm. The system pleases Porsche engineers in another important way: It's lighter than earlier models. And the induction sound it creates is rich and full—the perfect counterpart to its exhaust note.

Porsche Classic Models

Porsche Classic Models

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