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Denso (5304) IK20 Iridium Spark Plug, Pack of 1 |  | Brand: Denso
Category: Automotive Parts and Accessories
List Price: $20.38
Buy New: $7.50
as of 3/11/2010 08:28 PST details
You Save: $12.88 (63%)
New (7) from $7.50
Seller: Summerland Auto Sports
Rating:  5 reviews
Sales Rank: 385
Media: Misc.
Shipping Weight (lbs): 0.1
Dimensions (in): 3.4 x 1 x 0.9
MPN: 5304
Model: 5304
UPC: 042511053045
EAN: 0042511053045
ASIN: B000M6UR82
Availability: Usually ships in 1-2 business days
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| Features:
| • | Low fuel consumption | | • | Excellent acceleration and performance | | • | Stable combustion during idling | | • | Long life and high reliability | | • | Features iridium with high melting point |
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| Editorial Reviews:
Product Description
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
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| Customer Reviews:
Excellent June 1, 2009
Robert Petkus (New York)
9 out of 9 found this review helpful
Picked up a set of these to replace the stock NKGs on my 2005 Honda Accord 4 cylinder after 97k miles. The originals were still good -- just doing a spring-time overhaul.
Engine felt smoother although that could be psychological. What is real, however, is a solid and consistent 2 MPG increase in fuel economy from what I was averaging over the last 60k miles.
I'll try to update this review after 30k miles or so.
smooth running engine with this Iridium spark plug June 3, 2009
Edison (United States)
7 out of 7 found this review helpful
This fits in 1999-2003 Toyota Sienna. Trick to replace the three spark plugs in the back is to remove the windsheld wipers and the plastic piece for intake air and rain water collector -- a big piece from left to right.
After the spark plugs replaced, the engine runs smooth, starts faster. Since Iridium is very expensive, the tip is little -- 0.4mm in size, so that it can spark easily. Denso's web site says it has life 60,000 miles. Denso also developed one for Toyota and Lexus that has 0.7mm tip, that one can last 120,000 miles. 0.4mm has more precise ignition time, so that better fuel econemy.
Until recently, platinum was considered the best material to use on the top of an electrode because of its durability. However, Iridium is 6 times harder, 8 times stronger, and has a melting point 1200 degrees higher than platinum. Put that into a harsh environment such as an engine piston chamber, and you have a spark plug that can resist wear much better than platinum.
Faster Starts January 21, 2010
Wayne Bengston (Cordelia, CA)
1 out of 1 found this review helpful
I just installed a set of these in my 2001 GL1800. I previously had NGK standard plugs with under 1,000 miles on them and AC Rapidfire plugs with 24,000 miles on them.
The AC Rapidfire plugs were my previous favorite, but it seems they are not the same plug anymore, having lost the serrated center electrode. The Rapidfires I had previously installed were the non-serrated type. They still provided faster starts than new NGK plugs, but not the improvement I had witnessed in other engines with the serrated Rapidfires.
The IK20s, which, in spite of the title and picture, are Iridium Power plugs, provided about a 1/2 second start time, where new NGKs gave a slightly longer than one second start, and the Rapidfires gave a slightly less than one second start. The engine is running smoother than with the 24,000 mile Rapidfires, but that is no suprise. I can't tell if it is running smoother than with new Rapidfires, as the difference is negligable. That is the extent of my review so far, as I have not yet collected enough data to see if I get a fuel economy change, and the power difference is too negligable for me to tell.
The Iridium Power spark plug is good for 30,000 miles as per the Denso FAQ. If a 5% fuel economy gain is achieved, then the plugs will pay for themselves a couple of times in that time.
There is also a Denso Iridium Tough plug available, the VK20, which is supposed to give less of the benefits of the Iridium power, but last 60,000 miles while still giving improvements over conventional plugs.
Working Great! September 9, 2009
Richard Queen (KY, USA)
Bought these as part of a full tune up to my wife's '03 Honda Accord EX 2.4L. Engine is running smooth and strong...these did the trick. Hopefully, we'll see some mpg pickup like the previous reviewer as well! Only had them in for a week.
Fit my car February 6, 2010
G. Dougan (CT)
0 out of 1 found this review helpful
Was shipped promptly and arrived quickly. It was well packaged than a previous set of spark plugs I bought from Amazon. Amazon must be reviewing these reviews because I complained about the packaging the last time. Anyway, it is good to have a responsive seller who cares about what customers say.
I haven't observed an improvement in my gas mileage but I haven't been paying attention to it.
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