The CTS Turbo high-performance ignition coils are a cost-effective enhancement for the S58 engine found in the BMW M3 G80/M4 G8x and X3m, as well as the B58 engine in BMW's 140i/240i/340i/440i and the Toyota Supra 90. These coils deliver 10% more ignition power than standard coils and have a sporty ..