Every reliable LS or LT build starts with a strong ignition and electrical foundation, and this category brings together everything you need to keep your engine firing on all cylinders. Here you’ll find high-quality ignition coils, spark plug wires, starters, alternators, sensors, pigtails, adapters, and complete wiring solutions for both stock replacements and performance upgrades. Whether you're diagnosing a misfire, correcting wiring issues, replacing aging components, or wiring an LS swap from scratch, these parts ensure clean signals, strong spark, and dependable power delivery. If you want smooth starts, crisp throttle response, and rock-solid engine performance, this is the electrical backbone your build depends on.