GM OEM NR 12578277 - Alternative spark plugs

Replacement spark plugs for GM OEM NR 12578277:

Brand Model
Denso IT16
Denso IT16TT
NGK PZTR5A-15
NGK PZTR5A15

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The Spark Plug Cross references are for general reference only. Check for correct application and spec/measurements. Any use of this cross reference is done at the installers risk.
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