MSD Blaster coils exceed original equipment specifications, are a direct bolt-in replacement for easy installation, come in red or black, and offer a 1-year warranty from the original date of purchase. Upgrading your coils will make your engine start easier, idle smoother, provide improved throttle response, and increased power from idle through redline. Since MSD Blaster coils are designed to replace factory coils, they will not interfere with any other electronics or the factory computer.