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Denso (5303) IK16 Iridium Spark Plug, Pack of 1

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Denso (5303) IK16 Iridium Spark Plug, Pack of 1

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Product Features
Denso (5303) IK16 Iridium Spark Plug, Pack of 1
  • IK16

Product Review
Product Description
Denso Iridium Spark Plug Denso's Iridium power spark plugs help your vehicle achieve unparalleled performance. It alters the belief that a mere spark plug can add power and mileage. This is done by combining an ultra-fine 0.4mm diameter Iridium center electrode with a tapered cut U-groove ground electrode. Iridium conducts electricity better than platinum, however what makes it exceptional is it's also 6x harder and 8x stronger than platinum. This ultra-fine iridium center electrode provides superior ignition performance during acceleration and top cruising RPM. The U-groove ground electrode creates a larger, brighter flame kernel. The tip of the ground electrode has been tapered which further improves firing performance by reducing quenching. All of these features combine to give more horsepower to your motor. Technical Specifications - 14mm Thread, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Removable Terminal, ISO height, 0.4mm Iridium Center Electrode, Tapered Cut U-groove Ground Electrode, .044" (1.1mm) Gap

Product Details
Denso (5303) IK16 Iridium Spark Plug, Pack of 1
  • Automotive: 0 pages
  • Publisher: DENSO
  • Label: DENSO
  • Studio: DENSO
  • Sales Rank in Automotive: #9572

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Customer Reviews
Average Customer Review
21 Reviews
5 star:
 (15)
4 star:
 (1)
3 star:
 (2)
2 star:
 (2)
1 star:
 (1)
 
 
 

4 of 4 people found the following review helpful:
5.0 out of 5 stars 5 star product, May 31, 2010
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This review is from: Denso (5303) IK16 Iridium Spark Plug, Pack of 1 (Automotive)
I own a Civic LX 99 and this product made my engine start quicker and run smoother I had NGK before installing this! I will definitely be buying it once again except if Denso come up with better ones :-) (I highly doubt they will)
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3 of 3 people found the following review helpful:
5.0 out of 5 stars Can't be beat for old aircooled VW engine, December 11, 2010
By 
This review is from: Denso (5303) IK16 Iridium Spark Plug, Pack of 1 (Automotive)
I had a 1968 VW with the 1600 engine stock single port heads and single solex carb.
It had that floating miss that the engine was known for. I did some research and decided to give these a try and at the time there were 12-13 dollars each I bit the bullet and bought some pre-gapped for my engine installed them and the engine started easier, ran smoother, and could take off faster. No more floating miss. I have since learned that due to my engine configuration it was harder for the stock style plugs to fire. I had also tried NGK V powers because I was trying to stay with a standard copper core for the air cooled engine. Bosch stock plugs just didn't work as well either.

From my experience if you run high compression, aircooled, or hot engines use Denso Iridium plugs with the 0.4 wire.

If you have a stock setup water cooled you might try halo plugs or sonic plugs to save money. I've had good results with those also. Iridium plugs 10-13 each or about 6...Read more
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2 of 2 people found the following review helpful:
5.0 out of 5 stars Better than gadget plugs, February 3, 2009
This review is from: Denso (5303) IK16 Iridium Spark Plug, Pack of 1 (Automotive)
I have used the Denso plugs on my cars & race bike. I don't notice much in the cars (other than I haven't replaced a plug yet) but on the race bike; which I would have to replace regularly; they have proven to last longer; and I have had less misfires at redline. Expensive; but worth it.
(btw: asked someone to pick up a standard plug for my generator, they brought me an E3 plug -- avoid these; it cracked less than a month. Their arranty is "life of the engine" -- if it had completely fallen apart, engine life would have been over -- Avoid gadget plugs like E3, split electrodes, etc)
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Denso - 5303 IK16 Iridium Spark Plug, Pack of 1