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1.8 conversions

It's relatively easy to swap the NA and NB 1.8 engines into a 1.6 chassis. Here, you'll find the various adapters, mounts, etc to make life easier.

We do have a short guide on the swap as well as more detailed instructions.

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14 Item(s)

  1. 1.8 conversion coil bracket
    Mount a set of 1.6 coils on a 1.8 engine. Learn More
  2. CAS Extension
    $21.99
    Get rid of splices in your CAS wiring! Learn More
  3. Shown with optional TPS
  4. Hose splice with fan thermoswitch port
  5. 1.8 conversion kit

    From: $149.00

    To: $415.93

    Want to put a 1.8 engine in your 1990-93 Miata? Here are the parts you'll need. Learn More
  6. FM throttle body adapter
    Take the headache out of putting a 1.8 motor in a 1.6 Miata. Learn More
  7. NA75-39-021
  8. NA75-39-030
    $28.99
    Left side 1.8 motor mount bracket. Learn More
  9. Mazda Competition motor mount
    Stiffer motor mount to help keep a high power engine from moving around. Learn More
  10. Stock Mazda motor mount
    Tame excessive engine movement! Learn More
  11. 1999-00 EGR plug
    $7.99
    For cars with deleted EGR. Learn More
  12. NB is on the left, NA8 is on the right.
    Use a 1.6 throttle cable on a 1.8 intake manifold. Learn More
  13. EGR blockoff plate
    $19.49
    Stainless steel plate to block off the EGR fitting Learn More
  14. EGR cap
    $18.99
    For cars with deleted EGR. Learn More

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14 Item(s)