motorsports development group engine rebuilds thumbnailWe focus on three main areas for performance: head flow, compression, and bottom-end sealing to maximize horsepower. We perform flow bench work to continuously improve the recipe and all profiles are developed on our in-house flow bench. Blocks are honed using torque plates on a Sunnen Hone using our proprietary cylinder wall finish.

All Mazda internal parts are used and every motor is built to SCCA and NASA Spec, we use the K Tech whistler to measure each motor to assure it will pass tech and have the maximum legal compression ratio.


  • 1.6 and 1.8 Spec Miata from your core motor $4,500
  • 1.6 and 1.8 Spec Miata from crate motor (includes cost of crate motor) $5,450
  • 99 and up Spec Miata from your core motor $4,950
  • 99 und up Spec Miata from crate motor (includes cost of crate motor) $6,150

Cylinder heads:

  • 1.6 and 1.8 HLA heads $1,385
  • 99 and up solid lifter heads $1,595
  • Additional cost if valve guide replacement is need

We also build E and F prod Miata motors. Call for more information.

Spec Miata Transmission Builds

  • Transmission Rebuilds average cost (parts & labor):
  • 1.6 transmissions: $900
  • 1.8 and 99: $975

These costs assume good gears, hubs, and counter-shaft. We only use all new Mazdaspeed parts at the racer cost.

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