[Spaceywilly]

I don't really have an opinion on this but I thought it would be helpful to put all the official quotes on the subject in one place, since it seems like most people haven't read all of them.

SOA Blog on NASIOC:

What we've always said is that Subaru is leading the engineering on this car. We know, we've seen the drawings and they have a star cluster in the corner. Now, we haven't discussed where we are sourcing various parts and components and that info will all be available at debut. As for the question if are there Toyota enginers on the project - it's pretty certain that if you were developing a car with a partner, you'd have your engineers working on it too, for sure, that's why it's a joint project, but as we said, we are leading and responsible for the engineering on this car. As for very specific comments made on other forums about which specialist tuners if any we are working with, well let's just say we are surprised this is being talked about yet.... we're asking for confirmation about when we can talk about this in more detail, but for now let's confirm this remains a Subaru engine.

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Suppliers and vendors and partners always contribute to a vehicle/component development... we took that people understood that part for granted... we don't think many people thought otherwise. By your standards a car hasn't been "100%" in-house engineered since the Model T and probably not even then. All cars are developed using specialist supplier's expertise. Almost every major component has expert companies developing the state of the art. The modern in-house engineer's job is to have a vision for his area, specify what is needed and bring the various components/experts together to make a whole that works for his/her product, while watching costs, lead times, etc.

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Which brings us back to our original statement: Each company brings its expertise. Toyota is responsible for the design and packaging side of this project and we are responsible for engineering. As we said, the engineering drawings are ours.

Tetsuya Tada TTAC interview

“The first year was actually quite tough. The character and processes of the two companies are quite different. In the beginning, we sat down and decided who does what. That didn’t work out very well, because of the cultural differences between the companies. When people started to become more interested in the car itself, people from both sides ended up becoming one team. In the end, it wasn’t so much Toyota doing this and Subaru doing that, but people working together with one goal.”

This interview

Is Toyota or Subaru leading development?

If you want to see mild-mannered Subaru executives frown, feel free to mention rumours that Toyota is taking the lead in development work of the BRZ/FT-86. Masashi Uemura, Subaru's deputy general manager of corporate communications, emphatically denied that the upcoming sports cars were Toyota-led, pointing out that platform and drivetrain development, production engineering and final assembly of both cars was handled by Subaru at Subaru facilities.

To prove his point, he showed video footage of FHI boss Ikuo Mori attending a winter test session of BRZ prototypes at Subaru's Bifuka proving grounds in Hokkaido. In terms of motor show noise Subaru may well seem to be a silent partner to Toyota, but the firm insists it has played a major role in developing the BRZ/FT-86 twins.