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Why you NEED New Plugs & Coils prior to a JB4 Install
Why you NEED to Change your Spark Plugs & Ignition Coils prior to a JB4 Install If you have been around our site and read a few of our other posts, you know we preach one thing: changing your spark plugs and ignition coils BEFORE you install a JB4. Well I didn't follow my own rule... I