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Spark Plug; Iridium Long-Life; Resistor; Copper Electrode Core; Iridium Electrode Tip; 14 Millimeter Thread; 16 Millimeter Hex; 1.1 Millimeter Gap; 19 Millimeter Reach; Gasket Seat; Single
The DENSO Iridium Long Life plug is fast becoming the standard for today’s high-tech engines. Properties of DENSO’s patented Iridium alloy have broken through the spark plug technology barrier. Employing a revolutionary new 360 Degree laser-welding process, DENSO has created a spark plug unlike anything on the market today. Designed for durability under the most extreme conditions, DENSO’s patented Iridium alloy is six times harder and eight times stronger than conventional Platinum and can handle temperatures in excess of 4,000 Degree Fahrenheit. You’ll enjoy more horsepower, faster easier starts, less misfires under heavy loads, plus better conservation of fuel at all times. Using the same laser welding process as the Iridium Power spark plug, DENSO designed a long life spark plug factory-installed on luxury vehicles by automakers. Using its patented Iridium alloy, DENSO was able to shrink the center electrode to 0.7 Millimeter, dramatically improving ignitability and longevity.
| Feature | Details |
|---|---|
| Resistor | Yes |
| Electrode Type | Fine Wire Center |
| Electrode Core Material | Copper |
| Electrode Tip Material | Iridium |
| Insulator Type | Projected |
| Thread Size (IN) | 0.551 Inch |
| Quantity | Single |
| Reach | 3/4 Inch |
| Seat Type | Gasket |
| Wrench Diameter | 0.629 Inch |
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| If Picked Up On | Will be delivered by | ||||||
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| Thursday | Fri | Sat | Sun^ | Wed | Thu@ | Fri@ | Mon= |
| Friday | Sat | Sun^ | Mon | Thu | Fri@ | Mon@ | Tue= |
| Saturday | Tue* | Wed | Thu | Fri | Mon@ | Tue@ | Wed= |
| Sunday | Tue** | Wed | Thu | Fri | Mon@ | Tue@ | Wed= |
*Sunday^ delivery if the shipper is enrolled in weekend spotted trailer pickups
**Monday delivery if the shipper is enrolled in weekend spotted trailer pickups
^Monday if not a Sunday eligible ZIP code
@ The following week
= Earliest possible delivery the following week
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Bolted right onto my 5x114.3 Toyota with the 60.1 hub—no rings needed and zero vibration. ET38 gives a tidy, slightly flush look without rubbing. The silver finish is even and easy to keep clean, perfect for daily driving.
Ride quality surprised me—very smooth for 20s. Truck feels stable at 75 mph and the satin finish is uniform and easy to maintain.
Arrived well padded and the install was straightforward. Torque held, no shakes, and brake dust wipes off in seconds.
Bought these for my VW Jetta and I’m impressed. The ET40 offset sits just right—flush but not sticking out. The finish seems durable and hasn’t chipped at all. Ride feels slightly tighter, in a good way. Docking half a star only because packaging could've been better.
Solid quality and stylish design
Mounted these on my Celica GT and they look phenomenal. The wider setup gives the car a meaner look without rubbing. The matte black finish is rich and durable. Half a star off because I wish the packaging included extra protection, but the wheels themselves arrived perfect.
I bought these for my Toyota GT86 and I'm really impressed by the build quality. They're strong, lightweight, and balance extremely well. Matte black finish hides dust and still looks sharp after washes. Took off half a star because shipping was a bit slow, but the wheels themselves are flawless.
Installed these on my Toyota GT86 and the difference is amazing. The stance improved immediately, and the gold color contrasts beautifully with my white paint. Wheels balanced easily and feel strong. Docking half a star because I wish they came with matching gold center caps.
Put these on my Kia Optima and I’m really satisfied. The finish is flawless and hides brake dust very well. Car feels smoother on the road and the wheels balanced easily. Docking half a star only because I wish they included matching center caps.
Bought these for my Mazda 2 and they look fantastic. The black and machined finish gives a sporty yet classy appearance. Wheels balanced easily and feel solid on the road. Removed half a star only because I had to buy separate hub rings, but the wheels themselves are excellent.
Mounted these on my Toyota GT86 and they look absolutely gorgeous. The gold pops in sunlight but still looks classy. Handling feels slightly sharper too. Took off half a star because I expected better packaging, but the wheels arrived flawless.
Bought these for my Jeep Patriot and they suit the vehicle perfectly. The combination of gunmetal and machined accents looks high-end. Wheels balanced easily and feel solid on the road. Half a star off only because shipping took longer than expected, but product quality is excellent.
Installed these RTX Concorde Satin Black wheels on my Audi A3 and the difference is huge. The 5x112 fitment is perfect, no hub rings needed thanks to the 66.6 bore. The satin black finish gives a refined but sporty look. Car drives smooth and balanced at all speeds.
Installed the RTX Ulsan Satin Black wheels on my 2020 Hyundai Elantra and they look absolutely factory-fresh but better. The satin black finish gives a clean, premium look. Fitment with ET38 is perfect and the CB67.1 sits snug without any issues. Zero vibration and smooth driving.
Clean look and perfect OEM+ upgrade
