OEM Honda RBC intake manifold (K20A engines)
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This is by far the best intake manifold Honda has made as far as power is concerned. The RBC manifold out performs the PRB and PRC manifolds almost everywhere. There is a little loss in power from low to mid range rpm but from the 5500rpm point and up the RBC takes the win by a good bit.
The dyno graph above shows the difference in power gains. The red line is the RBC manifold and blue is the PRB manifold. As you can see, the PRB makes power to 7400rpm before falling off and the RBC keeps making power all the way to redline. All testing was done on an 06' RSX-S with a DC Sports Header and Cold Air Intake.
This manifold has been modified to secure a perfect fit on any k20A engine.
Dyno result shows difference between a slightly modified engine with and without RBC.
