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3354 Denso Iridium Long Life Spark Plug, Sold individually

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List Price : $20.59
Manufacturer #3354
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13/16 in. hex size; Projected tip; Solid terminal type; Gasket seat style; Machine rolled threads; Iridium long life electrode configuration
Iridium Long Life Series
Spark Plug Code:
Electrode Tip Material:
Iridium Electrode Tip
Quantity Sold:
Sold individually
1-year Denso limited Warranty
Anticipated Ship Out Time:
1-2 Business Days
Electrode Core Material:
Copper Electrode Core
Gap Size:
0.7 mm
Heat Range:
19 mm Reach
Thread Size:
14 mm thread size

Vehicle Fitment Information

Vehicle Name
Fitment Information
1968 Porsche 911
6 Cyl 2.0L
1968 Porsche 911
6 Cyl 2.0L
1969 Fiat 124
4 Cyl 1.4L
1969 Fiat 124
4 Cyl 1.4L
1969 Fiat 850
4 Cyl 0.8L
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Product Information

Denso Premium Class Extra Long Life Iridium Spark Plugs is fast becoming the standard for today's high-tech engines. Employing a revolutionary 360 degrees laser welding process, Denso has created a spark plug unlike anything on the market today. This particular spark plugs are designed for durability under the most extreme conditions, thanks to a patented Iridium alloy that is 6 times harder and 8 times stronger than conventional platinum and can handle temperatures in excess of 4,000 degrees Fahrenheit.


  • Platinum center electrode utilizes platinum to shrink the surface area of the center electrode tip for maximum firing performance and minimum voltage requirements
  • Platinum ground electrode resists gas and electrical erosion and corrosion extending service intervals to 60,000 miles,000 miles
Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 90 days and we’ll take care of it. Check out our Warranty Policy for more details.
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

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