Drivetrain Spark plugs R57
#1
Spark plugs R57
I replaced the plugs after 70k miles. Performance was ok, but I was overdue. I bought ZR-7-SI-332-S Bosch Plug through ECS tuning and noticed immediately I don't have the big boost anymore when I floor it. I checked the gaps, .025. Any tips of this? I searched around but a lot of conflicting info out there.
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