We're not really sure how to feel about this. It's an engine-swap kit from a company called Miata One in Idaho that gives you everything you need to replace the stock drivetrain in your NA- or NB-chassis Miata with a Subaru boxer and accompanying five-speed manual. It's $925, and requires you to modify the frame to get everything to fit. We're surprised this is a thing.

The kit is made to work with the Subaru EJ251 2.5-liter naturally aspirated flat-four, which powered various versions of the Impreza, Outback, Legacy, and Baja in the late 1990s and early 2000s. It requires the stock Miata transmission be replaced with a Subaru unit. The kit comes with engine and transmission mounts that bolt to the stock locations, but does not come with anything to get the Subaru and Mazda electronics to work together.

Aside from a slight improvement in power and a claimed reduction in center of gravity, we're not sure why you'd go through the trouble of swapping in a Subaru engine in place of the stock four-cylinder. From personal experience I can say that this EJ motor isn't all that special. Nor is it as reliable as the Miata's. Plus, I can say for certain the stock Miata transmission is a lot nicer to use, and a lot more durable than the Subaru's.

Then again, it's cool to be different, and this is as different as it gets. And if you're wholly dedicated to getting your car's center of gravity as low as possible—and picking up some horsepower and torque without a weight penalty—this could be the answer to your prayers. There are tons of engine-swapped Miatas out there, but this is the first we've heard of a Subaru boxer-swapped example. It's just not something you see.

via Engine Swap Depot

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