🔌 Denso 671-4239 Spark Plug Wire Set: Superior Performance and Durability Review

I tuned my Elantra for 100,000 km. New spark plugs and new wiring harnesses. I bought it. The engine sounded like new. Didn't know how rough it got. Don't be afraid to get them. Pop right in.

We replaced the old spark plug wires - 2005 Hyundai Elantra as part of the tuning. They were easy to install and at a great price! I ordered a new MAF from Revain yesterday. Replacing the old one at the shop cost $600. The one we ordered is $57, my husband will install it. It was also on Prime! A win!

I actually bought them 2 times in a row without understanding what the problem was until I replaced them. The cables weren't as durable as the OEM cables. The hard end of the spark plug on one of the wires broke while driving and I started misfiring because there was no connection. Very strange. I'm assuming that maybe it was because I didn't have the plastic engine cover, so maybe it worked and somehow broke (though unlikely). I replaced it again with these so hopefully they last longer this…

I bought this harness when it came time to tune our 2010 Kia Soul+ 2.0L. The cables fit perfectly, were easy to install, and cost a lot less than the $95 the dealer gave me. After installation, the engine became quieter. A few installation tips: Even if the wires are the same length as the OEM cables, only disconnect one cable at a time to maintain proper mating order. You'll also get extra room to route and connect wires if you take a few minutes and use a screwdriver to disconnect the hose…