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FM throttle body adaptor kit

FM throttle body adapter
FM throttle body adaptor kit
Take the headache out of putting a 1.8 motor in a 1.6 Miata.

Made in the USA

Exclusive to Flyin' Miata

Availability: In stock



When you're dropping a 1.8 engine into a 1.6 Miata, you need to keep the 1.6 throttle body to work with your old ECU. Adapting this to the new manifold is the biggest part of the job.
 This adaptor will allow the throttle body to bolt up to either a 1994-97 or a 1999-05 manifold. The throttle body does not need to be modified at all as the adaptor is thick enough to allow clearance of all parts. Two holes need to be drilled and tapped in your manifold then this adaptor bolts right up. Includes all necessary fasteners. Save yourself some trouble!

Included in our 1.8 conversion kit.
 Note - this will move your throttle body forward about 11/16", or 17mm. The 1.8 engine is also longer than the 1.6. Your existing intake will need some modification.

Additional Information

Additional Information

Part number 05-40000
Fits: 1990, 1991, 1992, 1993
Manufacturer Flyin' Miata
Flyin' Miata exclusive Yes
Fits Exocet? Yes
Proposition 65 Warning: Cancer and reproductive harm
California emissions No

Customer Reviews 2 item(s)

Good Job
Nothing like having the right pieces to facilitate an engine swap. This is one of 'em. Good Job, Flyin' Miata.
Review by The Wiz / (Posted on 1/24/2018)
Must have for a headache-free engine swap
This spacer works great!
Much easier to install with the engine out of the car due to clearance issues with the radiator but a 90° drill or adapter makes it almost as easy.
Review by M1k3.k0 / (Posted on 9/2/2017)
Click here for instructions for this part.

Why stop here? Consider this upgrade.