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Ford Mustang Cylinder Head Porting

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The 289 head casting has plenty of quench area complementing its small chamber. You can run this head with up to 331ci of displacement before it begins to become counterproductive. Figure on dishing the pistons to keep compression conservative when adding displacement and stroke. Maximum valve size is 1.94-inches intake and 1.60-inches for exhaust. This head has hardened exhaust-valve seats for unleaded fuel.
Ford Mustang Cylinder Head Porting - Head Trip

 The 289 head casting has plenty of quench area complementing its small chamber. You can run this head with up to 331ci of displacement before it begins to become counterproductive. Figure on dishing the pistons to keep compression conservative when adding displacement and stroke. Maximum valve size is 1.94-inches intake and 1.60-inches for exhaust. This head has hardened exhaust-valve seats for unleaded fuel.  View Related Article

 

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