cagranitz said: Has anyone noticed an increase in intake or exhaust noise with this type of mod ?



I believe they design those resonators on the factory intake to reduce intake air noise. I equate reduced intake air noise with smoother airflow. So I would think taking them out would actually work against better engine performance. Click to expand...

Sound is produced by air moving. The faster and higher the volume of air moving, the louder the sound generally is. Turbulence is also a factor.With that in mind, consider that air moves fastest, with more total volume, and the least turbulence in a straight line with few distortions in its path. Every extra bend and turn slows the air flow, and every little side chamber cause some sort of turbulence that dampens air flow. Points of general constriction can also cause air to 'back up', inducing a sort of pulse or resonation. In most cars, that point is the throttle body or intake duct as it reaches the air cleaner plenum, or both. This constriction is what causes a sort of 'honk' sound in some vehicles at full throttle. Its basically a sign that you are running out of enough space to pass the air the engine wants. When it only happens at full throttle and fairly high RPMs, its not a really big deal. This situation is common on most decently engineered cars for the street. (They aren't race cars after all.)Since it does occasionally happen on some cars, or often on others due to being engineered with economy and power limitation over outright performance, manufacturers use these 'intake mufflers' to induce a turbulence which is engineered to cancel such resonant intake noise. Put that all together and you'll realize you are sacrificing some flow (and hence power) for quiet and perhaps a touch better economy.So less noise can mean less power. You have to know why the noise is being made. The best thing about the mods shown here is that you are providing a straighter, cleaner path for the air. You might experience that wide open throttle 'intake honk', but that's not indicating a loss of power.Besides, it sounds cool!