Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - zx2 head on a zx3 engine
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Old 02-20-2013, 10:22 PM   #14
150mphzetec
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don't do it. Swapping the head will only net minimum gains if any. The reason the ZX2 drives different is because it is lighter than the focus. Plus the ZX2 had a slightly higher horsepower rating than that of the focus in 2000.

The hassle of swapping the head is not worth it. Just listen to these guys who have been around a while as they have valuable experience behind them.
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