🔌 Spectra Premium C-503 Coil Pack - Optimal for Every 2 Cylinders Review

Perfect fit for my Buick Ultra! The original coils on these cars are prone to fail and cause misfires or intermittent misfires. 2 screws hold them together and that's less than 5 minutes of work. I've seen people put dielectric grease on the base of these coils where they sit on the module. It seems to help them. The auto parts store wanted about $30-40 for what these stores always rip off. Great price for them and haven't had any issues since installing them.

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…

I bought this for my 2002 Chevy S10 which has a 2.2 liter 4 cylinder. If you have basic mechanical skills, it's pretty easy. Installed in 10 minutes. I will say one thing: make sure you use dialectical lubrication. They don't include it. I never connect anything to the electrical system in a car without it. Especially when it gets wet. Since mine are mounted on the lower passenger side of the engine I think it's important to add. I also took a silver marker and numbered each connector (before…