(9160) RC-ZE21 Spark Plug Wire Set

5/5 Genuine NGK Product. Quick and easy installation process. Was having idling issues with my 91 NA Miata. Misfiring was causing the engine to die. Changed spark plugs and improved by a large margin but was still trying to die. Purchased a new wire set and installed in about 10 minutes, immediately fixed the issue. Now the car is running better than ever.

Qualitu fitment and price fit mitata perfectly oem look amazing on the car and defeitly help car run better

The NGK ZE21 Spark Plug Wire Set is a great product. Like all NGK products, it just fits right without having to modify it. The spark plug wire set is made for the 1990 - 1997 Miata and the length of the spark plugs wires is perfect. I like pre-made spark plug wire sets and not the universal type that require the end user to cut the spark plug wires (to size) and then to crimp on a terminal for each spark plug wire. When you purchase the NGK spark plug wires make sure you purchase the "blue" ones which are the premium set and not the standard "black" spark plug wires. The spark plug wires should be changed every 30,000 miles on a Miata to maintain performance. These spark plug wires are exactly what is needed for maximum performance, so don't bother purchasing the so-called "high performance" spark plug wires because you won't get a better spark plug wire for your money.

I've never seen a car start faster, Incredible!

Update: I got the second set and they fit just fine. Seems like the earlier set I got was a dud. Go figure. Previous Review Below: For my 99 Miata 1.8. Got a set that did not click onto the spark plug when seated in the engine. Clicked on just fine when outside the engine. Seems the wire was placed too far up the boot.... not great in terms of their quality control. Read a few things online about people having to modify them and scoot the wire down... junk to me if you have to modify it to fit. Returning for a replacement... let's hope this was just one set I got...

Replaced my 2000 Miata Special Edition spark plug wires. Fit was perfect, car runs great. I'm very happy with this set of wires.

If you check the web you will see that the stock plug wires from Mazda for the Miata's do not last. These premium wires are absolutely worth it. My '99 Miata was stuttering when squeezing on the gas at low engine speed (say 35 mph in 5th -- top gear in my Miata). The comments on the web said that a common cause of the skipping at low RPM was the plug wires. I changed to these wires and the problem went away. I did not change anything else so it had to be the plug wires. I think one of the big reasons you need top quality wires is that the wires run right across the top of the engine block with very little distance to the metal. In between the heat and the proximity of an excellent ground it is easy to see why you need the best for plug wires.

I bought these to replace my original 92 Miata wires at 136,000 miles, due to the car sputtering every time I stepped on the gas. Installed in minutes with some electrode grease and they work like a charm, no more sputtering. I'm currently looking to buy a second Miata due to their legendary reliability and every photo showing the engine has the trademark blue wires running from the plugs to the distro. The wires are labeled in case you take off all four wires instead of removing and replacing one at a time and trying to guess the order, since they do have to be installed in a certain order... ;-) A must-have replacement for Miata owners.