ST170 Manifold on standard Zetec head
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Here's What It Takes to Redeem Ford's Underwhelming 2.0-Liter Zetec Engine
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Massive Zetec ULTIMATE CNC Ported Head V1.2 Released* - Massive Speed Forum
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Ford Zetec head porting exhaust side part 1 - YouTube
Motorsport Studio - The Art of Racing
RACELINE - Specialists
