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Kaddie Shack

NGK #4006 14mm Long-Reach (3/4") Spark Plugs, Pack/4, Type 4

NGK #4006 14mm Long-Reach (3/4") Spark Plugs, Pack/4, Type 4

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$14.95 USD
$14.95 USD
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Some aftermarket Type 1 heads, and even some of the VW factory heads (such as those manufactured in Mexico), came with longer reach (3/4") spark plugs that have the stock 14mm hole diameter in them.  All Type 4 engines also utilize this design.  Knowing that the 1/2" reach spark plug threads tended to strip easily and crack at the threads, this design helped strengthen the original design.  This is the spark plug to use for these applications.

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