This intake manifold adapter flange is a great choice for your engine upgrade. It fits all 2012 - 2015 Civic Si, 2013 - 2015 Acura ILX 2.4L, 2009 - 2014 Acura TSX 2.4L, and 2008 - 2012 Accord 2.4L. It also fits all variant models including 6MT, RHD, and international models. The Honda's RRC and RBC intake manifolds are top - notch for the K - Series engine. When doing a manifold swap on engines like the 2012 - 2015 9th Gen Honda Civic Si, this adapter is necessary to route coolant ports and seal vacuum ports. Our billet intake manifold adapter kit smoothly adapts both the intake manifold and DBW throttle body. Note that the RBC intake manifold may need injector boring for 9th Gen Civic Si injectors, or you can use standard K - Series style injectors. Acura RDX injectors are also a popular option. For 70mm ZDX / MDX applications, port matching the intake manifold plenum is recommended for best performance. Vehicles with RBC / RRC intake manifolds need specific intake systems. The kit includes a PRL Motorsports Intake Manifold Adapter Flange, a 3/8' BSPT Plug, various O - rings, coolant hoses, studs, and flange bolts.
Using this intake manifold adapter flange is quite straightforward. First, make sure your vehicle is one of the compatible models like 2012 - 2015 Civic Si. When installing, follow the included parts list carefully. Fit the adapter flange in place and connect the coolant hoses and other components as described. If you're using the RBC intake manifold with 9th Gen Civic Si injectors, you'll need to bore the injectors into the manifold. Otherwise, you can use standard K - Series injectors or Acura RDX injectors. For 70mm ZDX / MDX applications, take the time to port match the intake manifold plenum for better performance. When it comes to maintenance, regularly check the O - rings for any signs of wear or leakage. Keep the coolant hoses in good condition and make sure all the bolts and studs are tightened properly. If you notice any issues like strange noises or a decrease in performance, it's a good idea to check the installation and the components of the adapter kit.
