ENA Set of 6 Ignition Coil Pack Compatible with Chevy GMC Isuzu Hummer Saab Buick Trailblazer Envoy Rainer Colorado Canyon Ascender i-280 i-290 i-350 9-7x H3 2.8L 2.9L 3.5L 4.2L Replace# UF303 C1395

These ignition coils are excellent! They were very easy to install and fixed my car's misfire issue immediately. The engine runs incredibly smooth now, and the acceleration feels great. The quality feels just as good as the original factory parts but at a much better price. Highly recommended!

Tengo dos meses desde que se las puse, sin ninguna falla , se ven de muy buena calidad. Excelente compra. Saludos desde mty n.l.

Plug & play as it were, everything fit perfect & she's running like a kitten now. Quick delivery & great pricing.

I only had 1 bad coil but opted to replace them all since im at 175k miles. Though other reviews said they got some faulty coils, i did not. My previous misfire, which was very evident when cruising at freeway speed between 60 and 70mph was corrected and my trailblazer is running great again. Its a really easy install. 10mm socket and a common screwdriver is pretty much all you need. Take the coilpack out to disconnect the wiring clip to make the job easier. Push it up with your screwdriver and it will easily release. Trying to do it while the coilpack is still bolted down is much harder since the clipholding the wore connector is facing away from you. A mechanic wouldve charged a lot.

Amazing price, these provide a great spark as far as I can tell. Installed in a 2003 Envoy XL 4.2L i6 and that thing is zipping around like a torquey little sports car now, it was limping around nearly dead. I changed the plugs, coil packs, cam position sensor, fuel filter, air filter, changed the oil, seafoam top engine clean and lube, sea foam fuel and oil treatment, 108 octane on a full tank of gas (that might be why it seems zippy)