Please allow 4 weeks for delivery


Version 3

- New crankshaft adaptor in billet 4140 steel, beautifully CNC machined

- ARP 8740 Hardware included for bullet proof installation

- Tighter tolerances for better transmission alignment

- Thermostat spacer update allows for easier fitment

EcotecMiata Transmission Adapter Kit

  • - Only for use with 6 bolt crankshafts (2.2L, 2.4L)

    - Works with Ecotec Gen1 or Gen2 engines

    - Allows NA/NB 5 or 6 speed transmission to be used

    - Flywheel adapter allows the use of any 1.6/1.8 Miata clutch and flywheel. We strongly recommend the 1.8 flywheel, and at the very least an ACT HD or FM Stage1 clutch kit.

    - Thermostat housing spacers included to allow Ecotec thermostat housing to clear the Miata bell housing

    - Includes all mounting hardware

    - Does NOT clear factory oil cooler as fitted to early 2.4, or all 2.0 engines


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