Your ignition system will start to fail with age, which will ruin your fuel economy as well as your performance. ECS Tuning has created a kit that includes new coils and plugs, as well as a Genuine BMW plug service indicator. This particular kit includes 6 NGK iridium spark plugs, which are a very high performance plug for OEM replacement or forced induction.
6 URO ignition coils
6 NGK iridium spark plugs
1 BMW plug service indicator
1 packet of American Grease Stick dielectric grease