Spark plug? NGK PZFR6F
#1
These plugs were in my ITR race car when purchased-NGK-PZFR6F
How are they different then the stock type plug? They appear to be quite a bit longer. Would this be a advantage?
Thanks again,
NUEB....Paul
How are they different then the stock type plug? They appear to be quite a bit longer. Would this be a advantage?
Thanks again,
NUEB....Paul