Spark plugs
20

Asked by S Jun 09, 2019 at 03:31 PM about the 2007 Pontiac Grand Prix GT

Question type: Car Customization

What would be the
best performance
Spark plug to run
in my 2007 Grand
Prix supercharged
3.8l with 10.5mm
Plug wires and
headers and cold  
air intake.

1 Answer
20

S answered 4 years ago

They told me one step colder is double platium. Does that sound right. I feel ive lost power

Mark helpful

Your Answer:

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