Automatic Coil Selector

The MSD Ignition Automatic Coil Selector (model 8210) is a precision ignition management tool designed for serious automotive enthusiasts running dual ignition coil configurations. Whether you're building a high-performance engine, troubleshooting multi-coil setups, or optimizing spark delivery on a custom fuel injection system, this selector eliminates the guesswork of manual coil switching. It's engineered for installers and tuners who demand reliability and clean signal routing in competitive or street performance applications.

This automatic coil selector features dual inlet ports and a single outlet design, allowing seamless switching between two independent ignition coil sources without interrupting engine operation. The black anodized housing resists corrosion and heat damage, while the compact footprint (4.45" × 3.3" × 4.85") fits easily into engine bays with tight real estate. At just 0.61 lbs, weight is negligible—critical for race builds where every ounce matters. MSD's reputation for clean digital signal integrity ensures minimal EMI and crisp coil activation timing, making this selector ideal for both carbureted and fuel-injected platforms that require failsafe coil redundancy or progressive ignition strategies.

Installers, engine builders, and tuners benefit most from this selector when managing dual-coil ignition systems on bracket racing engines, street rods, or EFI conversions. It pairs seamlessly with MSD digital ignition controllers and aftermarket ECUs that support switchable coil outputs. Installation is straightforward—connect your two coil sources to the dual inlets, run the single outlet to your distributor cap or coil pack, and let the selector's internal logic handle coil switching based on your ignition module's commands. This proven design has earned trust in competition environments where reliability and precision coil management directly impact power delivery and engine longevity.