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Discussion Starter · #1 ·
I just picked up a nice low mileage 83 ZX turbo with P90a head. Before I remove the valve cover, is this the one with the hydraulically adjusted rocker lash? Car was manufactured 6/83 and has a true 69K on it.
 

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All documentation from the factory states that the P90A head was a midyear change to the '83 model.

They are MUCH quieter than the mechanical setup - all you hear is all of the injectors firing in batch (unless one or more lifters are bad).
 
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