Induction system with low pass filter for turbo charger applications

A turbo charger induction system comprising:

• a first tubular portion including a first plurality of longitudinally spaced ribs formed on a first inner tube surface;
• a second tubular portion including a second plurality of longitudinally spaced ribs formed on a second inner tube surface, said second tubular portion positioned in an overlapping relationship to said first tubular portion to form a flow path defined by said first and second inner tube surfaces;
• and
• a plate positioned within said flow path and generally between said first and second plurality of ribs to form a low pass filter for attenuating frequencies above a predetermined level as acoustic energy generated by a turbo charger enters said flow path.

A turbo charger induction system comprising:

• a first tubular portion including a first unlined inner tube surface;
• a second tubular portion including a second unlined inner tube surface, said second tubular portion positioned in an overlapping relationship to said first tubular portion to form a flow path defined by said first and second unlined inner tube surfaces;
• and
• a noise attenuation plate positioned within said flow path to form a low pass filter for attenuating frequencies above a predetermined level as acoustic energy generated by a turbo charger enters said flow path.