The stock Honda K-Series drive by wire throttle body is undersized, which can reduce overall power gains. Increasing the diameter of the throttle body allows more air to flow into the cylinders which in turn can create more power.
We recommend this upgrade after you have already installed the essential bolt ons, ie. Intake, header, exhaust, and Hondata Flash Pro. The ZDX J37 throttle body is an OEM Honda product which ensures maximum reliability and quality. Not to mention the cost for a 80mm/70mm throttle body will rival that of any other option. This product will require an adapter to be used on the RBC and PRC style flanged manifolds. Tuning will be required after installation.