

⚡ Ignite your ride with NGK’s precision spark wire set — because every millisecond counts!
The NGK (9160) RC-ZE21 Spark Plug Wire Set features 7mm ultra-low resistance copper wires with variable pitch winding for superior spark delivery and EMI/RFI noise suppression. Its high-temp silicone jacket resists heat up to 482°F, moisture, and oil, while corrosion-resistant stainless steel terminals ensure a secure, vibration-proof connection. Designed for easy installation with color-coded, numbered wires, this OEM-quality set enhances engine performance and reliability for internal combustion vehicles.



| ASIN | B000IY8OLU |
| Best Sellers Rank | #76,189 in Automotive ( See Top 100 in Automotive ) #4 in Automotive Performance Spark Plug Wires #66 in Automotive Replacement Spark Plug Wire Sets |
| Brand | NGK |
| Cable Type | Copper |
| Color | Blue |
| Compatible Devices | Internal combustion engine vehicles with a spark ignition system |
| Compatible Phone Models | Ze21 |
| Connector Gender | Female |
| Connector Type | Positive Locking |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.7 4.7 out of 5 stars (895) |
| Date First Available | July 6, 2006 |
| Exterior | Machined |
| Global Trade Identification Number | 00087295091609 |
| Indoor/Outdoor Usage | Outdoor |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.01 ounces |
| Item model number | 9160 |
| Manufacturer | NGK |
| Manufacturer Part Number | 9160 |
| Maximum Voltage | 15 Volts (DC) |
| Model Name | NGK Spark Plug Wire Set |
| Number of Items | 1 |
| Number of Pins | 2 |
| OEM Part Number | 8bbg-18-140, 8bk1-18-140a, fs01-18-140, fsd7-18-140b, kl47-18-140c |
| Outer Material | Silicone |
| Recommended Uses For Product | Improving engine performance in automotive and other internal combustion applications |
| Shape | Round |
| Special Feature | Heat Resistant |
| Special Features | Heat Resistant |
| UPC | 087295091609 |
| Unit Count | 1.0 Count |
C**Y
Genuine, Quality, Easy to Install Product
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.
D**O
NGK ZE21 Spark Plug Wire Set for Miata NA
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.
K**R
perfect fit
Replaced my 2000 Miata Special Edition spark plug wires. Fit was perfect, car runs great. I'm very happy with this set of wires.
T**I
Definitly good fitment
Qualitu fitment and price fit mitata perfectly oem look amazing on the car and defeitly help car run better
J**R
slow
good product
W**I
Perfect match!
Theses NGK wires fit my '96 Mazda Miata perfectly! As stated in another review they are numbered for each cylinder so they can be matched to the ignition coil numbers and basically made to the exact length needed to reach each cylinder so there isn't a bunch of loose plug wires along the top of the head. Coupled with a new AC/Delco ignition coil and NGK Iridium plugs my old girl runs great now plus the blue wire color adds an interesting, clean look to the engine compartment.
B**Z
Default Replacement for Miatas
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.
A**X
Incredible!
I've never seen a car start faster, Incredible!
N**D
Nice wire set. Easy to install on my 2000 Miata SE and looks good too. Goes nicely with new NGK spark plugs.
T**H
Was advertised to fit a Mazda 626 2000 2.0lt, but several of the leads are to short, so the set is useless
J**C
Works like a charm, easy install. It's authentic NGK and so far works great on my NB miata. Will update if there's anything but I don't have any doubts of the product.
L**.
Très bon kit de remplacement !
D**L
conforme merci
Trustpilot
5 days ago
4 days ago