Clean up your cooling system the right way. The R Theory Motorsports NA/NB Miata Waterneck Delete Plate is a direct replacement for the factory waterneck, giving you a clean, leak-free block-off solution if you're running a Coolant Re-Route.
Machined from 6061 aluminum and anodized in our signature blue, this plate is built to last and looks the part under the hood. A laser-etched finish ties it into the rest of the R Theory lineup.
Features
- 6061 aluminum construction - anodized in RTM signature blue with laser-etched branding
- Viton o-ring seal - mirrors the OEM waterneck sealing method for a reliable, long-term seal with no RTV or freeze plugs required
- Stainless steel fasteners included - everything you need to bolt it on
- 1/4" NPT port - comes plugged, but ready to accept a -AN adapter if you need to route a coolant line to your turbo
Fits
- 1990–1997 Mazda Miata (NA) - 1.6L and 1.8L
- 1999–2005 Mazda Miata (NB) - 1.8L
Notes
This plate is a direct replacement for the factory water neck. It is not compatible with vehicles retaining the stock cooling circuit or the factory water neck. Recommended for builds using a coolant reroute kit who want to clean up their engine bay.
What's Included:
- Waterneck Delete Plate (×1)
- Mounting Bolts (×2)
- 1/4" NPT Plug (×1)
- Sticker Pack
