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NGK G-Power Platinum Spark Plug (TR55GP): Enhanced Durability & Efficiency

(533 reviews)
Part # 3403
60 day replacement if defective
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Product Information

Product Details
Part No. 3403
Warranty Details (60 DAY REPLACEMENT IF DEFECTIVE)
NGK G-Power Platinum spark plugs are the best single platinum spark plugs at an economical price. G-Power plugs feature a fine wire platinum center electrode and a trapezoidal cut ground electrode that offers increased durability, improved fuel efficiency, lower emissions, faster starts and quicker acceleration over conventional nickel spark plugs. An excellent upgrade for vehicles which used nickel alloy spark plugs originally. For better performance consider upgrading to a NGK Iridium IX plug. For even greater performance consider upgrading to a NGK RUTHENIUM HX plug.

Product Features:
  • SINGLE PLATINUM TIP: Fine wire 0.6 millimeter platinum tip center electrode ensures improved durability and a consistently stable spark
  • PLATINUM ALLOY: G-Power platinum provides exceptional value with increased performance and longer service intervals than factory nickel plugs
  • TRAPEZOIDAL CUT GROUND ELECTRODE: Reduces quenching design produces improved ignitability and performance
  • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
  • COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
  • RECOMMENDED USAGE: Lower cost alternative to double precious metal spark plugs or as an upgrade to OE nickel alloy spark plugs
  • Improved Fuel Efficiency: Designed to offer better fuel efficiency, the NGK G-Power Platinum spark plugs help you save on fuel costs.
  • Lower Emissions: These spark plugs contribute to lower emissions, making them an environmentally friendly choice.
  • Faster Starts and Quicker Acceleration: Experience faster starts and quicker acceleration with the advanced design of the NGK G-Power Platinum spark plugs.
Specifications
Center Electrode Core Material:
Copper

Center Electrode Design:
Fine Wire

Center Electrode Insulator Tip Projection:
0.16 in

Center Electrode Projection:
Mid Projection

Center Electrode Tip Material:
Platinum

Electrical Terminal Type:
Non-Removable Nut

Electrode Core Material:
Platinum

Electrode Tip Material:
Platinum

Gap Size:
0.06 in

Grade Type:
Standard Replacement

Ground Configuration:
J-Gap

Ground Electrode Core Material:
Nickel

Ground Electrode Quantity:
1

Ground Electrode Tip Design:
Trapezoid

Ground Electrode Tip Material:
Nickel

Ground Strap Quantity:
1

Hex Size:
5/8" (16mm)

Insulator Height:
2.07 in

Insulator Material:
Ceramic

Manufacturer Heat Range:
5

Pre-Gap Size:
.060 in

Reach:
0.689 in

Resistance:
5000.0 ohm

Resistor:
Yes

Resistor Type:
Yes

Seat Type:
Tapered

Shorty Spark Plug:
No

Skirt:
No

Skirt Length:
0.0 in

Spark Plug Approximate Resistor Value:
5K

Thread Diameter:
0.551 in

Thread Size:
M14 - 1.25

Tip Configuration:
Solid

Type:
Single Platinum

Washer(s) Included:
No

Wrench Diameter:
5/8 in
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4.72 out of 5
533 Customer Reviews
90% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
427
4 Stars
82
3 Stars
14
2 Stars
1
1 Star
9
Pros
91
Improves Engine Efficiency
77
Easy To Install
74
Increases Power
54
Durable
17
Lightweight
Cons
391
No
34
(null)
8
none
7
Yes
3
No Improvement In Performance
Most Liked Positive Review
Great plug
Was time to replace plugs on my wife's Mercedes ML430, needed a platinum plug, takes 16 plugs. Shopped between Bosch, Denso, and NGK - ended up getting NGK. Never had a problem with these plugs in the past or the other brands mentioned, just came down to price. Some people get carried away with spending more money than needed on plugs, just a maintenace item that will improve performance if changed regulary but will not change your vehicle into something it's not.
Most Liked Negative Review
"Pre-gapped" a misnomer
NGK brand spark plugs are good spark plugs and are the recommended brand for both 2005 Kias I own (Sedona EX and Rio Base). However, while a seemingly big deal is made by Autozone tech commentators about spark plugs being "pre-gapped" by the manufacturer, what they either fail to realize, or plain don't know (those are the ones to need to go to WalMart and apply for a job instead of any automotive parts store!) is that, during shipping from the manufacturer to the reatail warehose and thence to the individual stores, the spark plugs slide around in their individual packaging, are dropped, shaken, etc. which can very well change (narrow) the preset gap by the manufacturer. I have found the actual variance of pregapped plugs to be as much as 0.05 betweeen manufacturer spec and what I recieved from the store. Customers should ALWAYS be advised to "double check" the gap prior to installation, although most GOOD mechanics alredy know and practice this as a habit.
Reviewed by 533 Customers
Nice Plugs, great value
Verified Buyer -
The part looks well constructed. The gaps were slightly off on a couple plugs, but gaps should always be checked before installation. The engine runs smooth, but then again I never let the engine tune deteriorate to the point of poor gas mileage or rough running. The auto maufacturer recommends changing plugs at five years regardless of mileage.I've always found that NGK are excellent plugs. The price is very reasonable, very satisfied at this point.
Bottom Line Yes, I would recommend to a friend
Great Spark
Verified Buyer -
midrange great plug for my 99 legacy(winter beater). with 180k milesdef added some pep to the old beast
Bottom Line Yes, I would recommend to a friend
Nice plug
Verified Buyer -
My Mitsu likes these plugs. Had Bosch platinum plus before. These ones idle smooher and better pick up.
Bottom Line Yes, I would recommend to a friend
what was called for
Verified Buyer -
to tune up a car
Bottom Line Yes, I would recommend to a friend
I would buy this product again & again
Verified Buyer -
I was thrilled to find these G POWER SPARK PLUGS for such a GREAT PRICE!!! They have improved my cars performance so much and I am getting more miles per gallon of gas then I had expected. My gas usage has declined greatly. I feel like I'M driving a new car!!! Delivery of product was right on time. I am so pleased that I decided to shop at ADVANCEAUTOPARTS.COM that I am going to be a returning customer for all of my auto needs. Sincerely, HAPPY BUYER
Bottom Line Yes, I would recommend to a friend
Displaying Reviews 1 - 5Back to Top
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