What are the best spark plug wires for durability, conduction, fuel economy if any, and warranty. And the same for ignition coils, wondering about upgrading, are there any noticeable differences?

 

Oem, everything... FWIW there's no notable difference in running ability, power, mpg, but you do get added idling issues, random c.e.l. Codes, and buzzing or static on the radio if you do upgrade!...i would say spend your money in something else, or even just put that towards buying ethanol fee gas. You will notice better results from that, then upgrading any of the ignition system...again i don't have any real world input, just seems to be what I'm reading on forums, I've stayed oem replacement and have been fine

 

Oem plugs too. I was getting horrid spark knock with ngk iridium.

 

wise advice- OEM ignition is better than anything out there.