Review on 🔌 Spectra Premium C-503 Coil Pack - Optimal for Every 2 Cylinders by Mike Groover

Seems to work! Misfire fixed immediately! However, it doesn't perfectly match the old Delco AC coils on my Buick Regal 3800 V6 01 (dimensions vary slightly). I smeared quite a bit of dielectric grease on the bare metal between this coil and the next. Next time I will definitely replace all three. Otherwise it feels very well built! The connector wires snapped easily into place. If you plan on scratching the connector numbers on the clean surface, a felt tip pen won't help. Time will tell if it can match the durability of the dusty originals. Save some money and get started!