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Message: <blockquote data-quote="Wild_Seven" data-source="post: 1886831" data-attributes="member: 11453">S Flow mufflers usually have 3 chambers, meaning to say the exhaust actually flow all the way to the middle chamber of the box, then to the front chamber and finally to the rear chamber and this is only an example as there are many variations to the S flow design. Sometimes there is even a bypass pipe between the middle and rear chamber.Less blocks need NOT necessarily gives better throttle response and acceleration as it lessens BACK PRESSURE. Normally aspirated cars need sufficient back pressure to generate torque, unlike Forced Induction equipped cars. (Similarly to the piping size). Less chambers will also likely to cause the exhaust to be louder. Bigger pipes will also cause a drop in back pressure and increase in loudness. General Rule of thumb, increase of pipe size and decrease of chambers will lessen back pressure and hence loss of low end torque but will result in a slight gain of HP in the top end. As in the Golden Rule of Creation, you cant create something out of nothing.</blockquote>

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