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Denso
Denso (4504) PK20TT Platinum TT Spark Plug, Pack of 1 - Denso
ACDelco
ACDelco 41-902 Professional Platinum Spark Plug (Pack of 1) - ACDelco

Side by Side Comparison of: Denso vs ACDelco

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Denso http://ecx.images-amazon.com/images/I/3111NqTIMxL._SL160_.jpg
Denso (4504) PK20TT Platinum TT Spark Plug, Pack of 1 - Denso
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ACDelco http://ecx.images-amazon.com/images/I/31EAoVWVqNL._SL160_.jpg
ACDelco 41-902 Professional Platinum Spark Plug (Pack of 1) - ACDelco
Rating info
eComparisons Score
eComparisons ScoreThe "Comparison Score" Is calculated based on the average number of times this item was compared with other items in this category by our users
9
8.6
User Rating (Amazon)
User Rating (Amazon)

Five Star Reviews:

79%
Can't go wrong with Denso
August 2, 2017
I worried it mght not perform well due to the price relative to others. But i chose the Denso brand as it is a big deal for Lexus and it has lived up to the billing. Ride is definitely smoother.
Five Stars
June 18, 2017
Work Great
Five Stars
April 17, 2017
I have these in my 2004 Honda Civic, they work well.
Five Stars
March 22, 2017
still working
Great Product, Great Price
December 24, 2016
I bought these for my 2010 Lancer a bit before it was due for replacements because they were so cheap that I couldn't justify inspecting the existing plugs and not replacing them while I had them out. They seem to work at least as good as the OEM set that I took out.
73%
My 454 runs like a top
June 13, 2017
OEM replacement. My 454 runs like a top. (It still drinks gas like a sailor on shore leave though)
plug
May 30, 2017
good plugs cheaper than local
Good performance
March 8, 2017
Good performance.
Five Stars
December 8, 2016
best deal i could find on the plugs i bought
Five Stars
June 16, 2016
Arrived on time and work great! Less expensive and more convenient to aquire.
Perfect replacement for my 41-921 plugs on my 2000 Impala
March 24, 2015
Perfect replacement for my 41-921 plugs on my 2000 Impala. If I had known the OEM plugs were Iridium I would have gone with those but these platinum plugs should last as long as I own the vehicle. I have had a set of ACDelco Platinums in my 1998 GMC 1500 5.7L for 20K now and it still runs perfect

Four Star Reviews:

12%
After I bought these I realized they are platinum and ...
September 10, 2017
After I bought these I realized they are platinum and OEM for the Accord as near as I can tell is Iridum.

I took my car into a dealer for the airbag recall after having these in for only 500 miles and they told me I needed new plugs! I think they were just trying to scam me as they could not possibly be worn after so few miles. Goes to show you need to watch out with auto shops, even franchised dealers. In this case it was a "top rated" Honda dealer.
Four Stars
September 4, 2017
Perfect fit and function for my son's 2005 VW Passat with the 1.8T engine
Four Stars
May 1, 2017
works as intended
Four Stars
March 9, 2017
Change them out so no problems.
Good spark plugs!
January 19, 2017
Good priced spark plugs! I don't know much about gapping them so I can't comment on that. They all looked identical out of the box.

I used these in a 1999 Toyota Camry LE 4-cyl. Seem to slightly improve engine performance over the spark plugs in there that had over 100k miles on them.
23%
Good product. In retrospect
August 14, 2017
Good product. In retrospect, if you have a 3.5 GM engine mounted sideways, where you need to pull the engine forward to access the 3 rear plugs, invest in the double platinum plugs because they last longer, and you can delay the install process for quite a while...but these work great, and I'm happy.
so good.
June 10, 2017
Must gap them, but so far, so good.
all good..
November 1, 2016
ran them on my truck and no check engine light so, all good..
Four Stars
June 7, 2016
it runs gud thanks
Need to send back
November 11, 2015
These are the wrong plugs
Worked OK
October 8, 2015
They Fit and worked OK

Three Star Reviews:

3%
ORDERED 8 SPARK PLUGS, ONLY RECEIVED 7, PAID ...
July 8, 2017
ORDERED 8 SPARK PLUGS, ONLY RECEIVED 7, PAID FOR EIGHT, NOT SEVEN.. SOMEONE SHOULD DO A LITTLE QUALITY CONTROL ON THOSE PUTTING THE ORDERS TOGETHER.
Not properly indexed!
April 22, 2017
If you are kind of old school like me and you still check plug index, these were way off and all different. I used the exact same plugs (except platinum instead of iridium) because I liked how "spot on" the index was @ 35 ftlb. These new plugs are 180ish degrees off and all slightly different. If 12 o'clock is spot on, 1 was 6, 1 was 8, 1 was 5 and 1 was 4. I'll probably never buy denso again. I took a chance because I liked the ones that were in it. Seller was great, this is a manufacturer issue.
Oem
January 19, 2017
Plugs worked but we're shorter than manufacturer original.
They work ok, but my vehicle didn't like them.
January 9, 2017
They work, but my 2005 Honda Element didn't like them. Very sluggish, down on power, lost 1 1/2 mpg.
Work great, but one was cracked and could not use it
August 10, 2016
Bought 4 of these for a Honda Element. One had cracked ceramic, so had to go to the local automotive store to replace it. The others worked great though.
0%

There are no reviews yet

Two Star Reviews:

2%
not a jk plug
January 15, 2017
This does NOT fit a Jeep JK as stated here.
Two Stars
June 24, 2016
Ok
Meh
February 21, 2016
Well, the only thing good about it is that my car still starts and runs. I have an '07 Honda Fit w/ 110k. Tune-up time. Pulled the factory plugs; Denso Iridium. Didn't want to spend all kinds of cheddar. Figured I'd go with platinum and save $ since these were a great price. Bad idea. Car is sluggish now and mpg have decreased by about 4 mpg. I didn't gap them before the initial install. They came .038 out of the box not .040 as stated. Stock plugs were .051, but the Fit has a "mystery gap" apparently as the manual says .039-.043 yet the OEMs came out at .051, and car parts stores quote it at .044 OR .052. W T F! So I just finished gapping these Denso Platinums to .052 and reinstalled. When I pulled them out after only 200 miles on them, they looked pretty beat up. More beat up even than the Iridiums with 110k miles. Thinking about just reinstalling those. I've only driven about 10 miles so far with these Platinums gapped to .052 so it's too small a sample time to really tell if they work well, but out of the box I give them 2 stars. Pretty pissed about this. I figured with all the reviews and the Denso name, I'd be getting great performance and gas mileage, but so far these are performing like butt plugs rather than spark plugs.
Strange..!!
December 27, 2015
The item does not fit my BMW 2007 760li, when I purchased it was saying it fits..!!
I installed these in my 2005 SAAB and my MPG ...
June 16, 2015
I installed these in my 2005 SAAB and my MPG went down to 20mpg from 22-23.
I ordered NGK copper, and replaced them. (MPG went up to 22-23 on my normal commute).
0%

There are no reviews yet

One Star Reviews:

4%
One Star
August 10, 2017
poor quality product. Lasted 2 weeks, replaced with Bosch plugs
2004 VOLVO XC90
June 11, 2017
 ONLY USE OEM RECOMMENDED PLUGS FOR VOLVO. I HAVE A 2004 XC90 140k MILES AND BLEW OUT FOUR OF THE FIVE IN LESS THAN 3 WEEKS...THE OTHER REVIEWS SPEAK OF MISFIRES WELL I CONFIRM. WHEN I REMOVED THEM TODAY I WAS ABLE TO MOVE THE CENTER OF EACH OF THE BAD PLUGS IN AND OUT ( YOU CAN ACTUALLY MOVE THE ANODE FROM 0 MM GAP OR TOUCHING TO 1/4 INCH GAP WITH NO EFFORT). EVERYWHERE VOLVO SAYS PLATINUM BUT ALSO SAYS ONE MANUFACTURER. IT'S ALL ABOUT THE TURBO. Bosch FR7DPP Original Equipment Replacement Spark Plug, (Pack of 1)
One Star
June 2, 2017
Did not work
Had to go to Auto Zone to get new spark plugs which is working fine.
March 11, 2017
Bought these for my Honda Civic LX 2003. They worked for about a month and then one spark plug started burning and my car kept vibrating and jerky movements. Had to go to Auto Zone to get new spark plugs which is working fine.
Changed and all was fine. Stick to the OEM
December 3, 2016
2006 Audi s4 b7 4.2l Misfire and engine codes. Changed and all was fine. Stick to the OEM NGK
4%
If you have a late 90's to early 2000's 5 ...
March 4, 2017
If you have a late 90's to early 2000's 5.7 vortec, use the iridium plugs. These 41-902's are very disappointing! 2 plugs lost "platinum" pads, plus 1 plug developed cracks in insulator that caused a hesitation/stumble @ 1500 to 2000 rpm under light throttle.
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Pricing info
Old Price
Old Price
Price
Price
$3.85updated: Jan 18, 2018
$5.10updated: Jan 18, 2018
Features
Answered Questions
Answered Questions
-
Article Number
Article Number
0042511045040
0707773616208
Binding
Binding
Automotive
Automotive
Brand
Brand
Denso
ACDelco
Currency
Currency
USD
USD
Formatted Price
Formatted Price
$5.35
$10.06
Height
Height
142.9 in
51.2 in
Length
Length
39.4 in
181.1 in
Manufacturer
Manufacturer
Denso
ACDelco
ManufacturerPartsWarrantyDescription
ManufacturerPartsWarrantyDescription
Parts
100,000 Miles / Unlimited Months (Parts Only)
Model
Model
PK20TT
41-902
MPN
MPN
PK20TT
41-902
Number of Items
Number of Items
1
-
Number of Parts
Number of Parts
PK20TT
41-902
Product Group
Product Group
Automotive Parts and Accessories
Automotive Parts and Accessories
Product Type
Product Type
AUTO_PART
AUTO_PART
Publisher
Publisher
Denso
ACDelco
Quantity
Quantity
1
1
Reviews
Reviews
Score
Score
9.2
9.8
SKU
SKU
NP4504
ACS 41-902
Studio
Studio
Denso
ACDelco
Warranty
Warranty
-
100,000 Miles / Unlimited Months (Parts Only)
Weight
Weight
0.1 oz
1.4 oz
Width
Width
39.4 in
149.6 in
Feature
Feature

DEN # 4504

Platinum alloy 1.1 mm fine wire center electrode

Titanium enhanced 1.5 mm fine wire ground electrode

One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal. Reduces radio frequency and engine interference, regulates spark plug energy and seals against compression pressures for long life

Double platinum point pad on center and ground electrode offer increased durability and consistent voltage demands to reduce wear on ignition system

100% Pure Copper Core results in cooler electrode temperature for enhanced durability and superior fouling resistance

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