chuy_xgamer
Member
Registered: 2nd May 05
Location: Monterrey, Mexico
User status: Offline
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Resonators
Resonators are designed to reduce harshness and volume of the exhaust sound prior to the muffler. These are typically an additional muffler which is placed directly behind the catalytic converter. For maximum flow and performance, these should be eliminated. In most cases, resonators are the same restrictive design as conventional reflection type mufflers. From a performance perspective, they serve one purpose, to cause back pressure and decrease power output. The drawback to this is increased exhaust sound volume. As described earlier, straight through mufflers cause little or no back pressure and adding an additional straight through muffler to an exhaust system will not decrease performance measurably. However, adding a straight through muffler will help reduce exhaust sound volume. This is a very effective use for a straight through muffler without sacrificing performance. 
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