Miata 1.8L NA or NB Basic Intake Flange Kit - Round or Oval Runner shape
CNC machined flange which matches the 1.8L NA or NB Intake ports with the exact shape of a Honda B16/B18 intake manifold. Flange is 1/2" thick and provides a recessed pocket for precise alignment of the runners to the flange. This flange is specific to NA 1.8 or NB 1.8 heads. Please select the option which matches your engine.
Flanges come in 3 variations. The 3 variations are 1.5" oval runner, 1.75" round runner, and 1.5" round runner. Please contact us if there is another runner shape in which you are interested. We can measure and provide a custom flange to your specification.
Due to the large variety of flange options, very low inventory of flanges is kept on hand. When there is no inventory on hand, flange kits are made to order and have a roughly 2 week turnaround from when the order is placed to when the kit is shipped. If a flange is to be made to order, we will reach out to you directly via email to confirm an expected ship date. As with all of our parts, flange kits are made in house by us in the USA.
Orders outside of the US require a shipping quote. If you're outside the US and would like to purchase, please select "pickup" for the shipping option and put your shipping address and email in the order notes. We'll contact you with a shipping price. DO NOT select the standard shipping rate as this will cause an order cancellation.