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Old 12-22-2012, 10:22 PM   #21
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You will not see 20 - 30 HP gain from a ported head , not even half that , 1/4th if you lucky and I am not talking about surfacing the head to raise the compression as that is the biggest power gain you can get on any NA engine

I have done a few Zetec NA engine with stock heads in the mid 150 range , you dont need a ported head to get into the mid 150 HP to the wheels

Ported head does very little in NA form or boosted form on the Zetec engine , If you want to spend about 3500 - $4000.00 on the Zetec head you can make it make good power but you wont get 3500 worth of power

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