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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  1. 1.8 conversion kit
    1.8 conversion kit

    From $149.00

    To $413.23

    Ships for free!
    Want to put a 1.8 engine in your 1990-93 Miata? Here are the parts you'll need. Learn More
  2. Shown with optional TPS
    TPS upgrade kit for NA6
    As low as $49.99
    Ships for free!
    Give your aftermarket ECU a real throttle position sensor! Learn More
  3. Hose splice with fan thermoswitch port
    Hose splice with fan thermoswitch port
    $37.99
    Make your 1.8 swap easier. Learn More
  4. FM throttle body adapter
    FM throttle body adaptor kit
    $68.99
    Ships for free!
    Out of stock
    Take the headache out of putting a 1.8 motor in a 1.6 Miata. Learn More
  5. NA75-39-021
    1.8 motor mount bracket (right side)
    $50.99
    Ships for free!
    Right side 1.8 motor mount bracket. Learn More
  6. NA75-39-030
    1.8 motor mount bracket (left side)
    $28.99
    Left side 1.8 motor mount bracket. Learn More
  7. 1.8 conversion coil bracket
    1.8 conversion coil bracket
    $48.99
    Ships for free!
    Mount a set of 1.6 coils on a 1.8 engine. Learn More
  8. Mazda Competition motor mount
    Mazda Competition motor mount
    Rating:
    100% of 100
    $53.99
    Ships for free!
    Stiffer motor mount to help keep a high power engine from moving around. Learn More
  9. Stock Mazda motor mount
    Stock Mazda motor mount
    $42.99
    Ships for free!
    Tame excessive engine movement! Learn More
  10. NB is on the left, NA8 is on the right.
    Throttle cable adapter
    As low as $16.99
    Use a 1.6 throttle cable on a 1.8 intake manifold. Learn More
  11. 1999-00 EGR plug
    1999-00 EGR plug
    $7.99

    For putting a 1999-00 engine, MSM engine, or any BP engine with a FM turbo kit into a 1990-93 car that does not have factory provisions for EGR.”

    Learn More
  12. EGR cap
    1994-97/2001-05 EGR cap
    $18.99

    For putting a 1994-97 engine or a 2001-05 VVT engine into a 1990-93 car that does not have factory provisions for EGR.

    Learn More
  13. EGR blockoff plate
    EGR block-off plate
    $19.49

    For putting a 1994-05 engine into a 1990-93 car that does not have factory provisions for EGR.

    Learn More
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