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Trying to put 03 legacy engine into a 99 RS

SausageMahoney
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

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I believe the only difference is that the 03' had a MAP sensor, and the 99' used a MAF. I have access to a wrecked 03' with low milage, and my RS has almost 120k on it. I think the Legacy also has a rear L.S.D., it would be nice if that fit. If anyone knows anything about this, please don't hesitate to post.

I thought all the newer legacies had MAF sensors......

 

Is there anything wrong with your current motor? 120k on a subaru is peanuts. You could swap the motors. I'd recommend using your current intake manifold and wiring harness. Only issue I can see is if the shape of the port on the heads for the intake is different. That would keep you from using your current intake manifold.

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