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Product Information

Product Details
Part No. 4006
Warranty Details (60 DAY REPLACEMENT IF DEFECTIVE)
NGK Standard spark plugs (in the iconic NGK 'yellow box' packaging) are a proven OE cornerstone and technology customers have relied on for decades. Engineered specifically for OE applications, NGK Standard spark plugs provide OE quality nickel alloy reliable performance and design. NGK's legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance, while triple gasket sealing prevents combustion gas leakage. Solid 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties.

Product Features:
  • ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction nickel alloy center electrode provides consistent performance
  • RECOMMENDED USAGE: Best for vehicles with OE nickel alloy plugs, not recommended on vehicles with factory precious metal plugs
  • NGK's OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric 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
  • TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
  • Triple Gasket Sealing: Prevents combustion gas leakage, ensuring efficient engine performance.
Specifications
Center Electrode Core Material:
Copper Core

Center Electrode Tip Material:
Nickel

Electrode Core Material:
nickel

Electrode Tip Material:
nickel

Gap Size:
0.036 in

Ground Configuration:
Standard

Ground Electrode Core Material:
Nickel Core

Ground Electrode Quantity:
1

Ground Electrode Tip Design:
Standard

Ground Strap Quantity:
1

Hex Size:
13/16 in

Manufacturer Heat Range:
5

Reach:
19 mm

Resistor:
Yes

Seat Type:
Gasket

Shorty Spark Plug:
No

Spark Plug Approximate Resistor Value:
5K Ohm

Thread Diameter:
14 mm

Tip Configuration:
Solid

Type:
Standard

Wrench Diameter:
13/16 in

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4.86 out of 5
1022 Customer Reviews
98% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
932
4 Stars
64
3 Stars
9
2 Stars
5
1 Star
12
Great OEM replacementWonderful Price for my VW Sandrail.
never ran better!I would buy this product again as it is priced wellGreat plugsNGK Is Always My First Choice!OEM swap
Pros
52
Improves Engine Efficiency
51
Easy To Install
44
Durable
36
Increases Power
11
Lightweight
Cons
10
none
2
None
1
Difficult To Install
1
U Never Have It I Stock
1
Hard to find listing
Best Uses
53
Replacement
51
Everyday Driving
18
Performance Driving
16
Restoration
8
Racing
Car & Truck
8
Auto Enthusiast
8
Mechanic
7
Casual Driver
4
Competitive Driver
3
Truck Enthusiast
Describe Yourself
30
Auto Enthusiast
27
Casual Driver
23
Mechanic
6
Truck Enthusiast
4
Competitive Driver
Motorsports
1
Casual Rider
1
Mechanic
Most Liked Positive Review
good plugs
I have a 1952 Ford F-2 pickup 3/4 ton that has the V-8 flat head engine and it floods easily and as all engines of this era did it burns some oil ruins plugs so I tried NGK and so far they are working out,time will tell.I also have a 1954 Ford Customline 2 door sedan with a 239 overhead valve V-8 and will be ordering a set of NGK plugs for it also.I like to carry spares because these older engines with carburators and manuel chokes all have a mind of there own and no two start with the same set of rules.Some you need to pump the gas several times some not so much and some not at all and also it depends if the engine is cold warm or hot or if it is raining they respond differently so again plugs do not usually last very long.
Most Liked Negative Review
no. wont work in anything i own
i ordered br8es for my superjet and somehow i ended up with br8hs . didn't notice till i got home with these and they are useless to me. went back to exchange and i was denied an exchange. inventory they said . i used my $10 coupon and now it's totally wasted. small problem i know but it's my problem. most of the time i come away pleased,not this transaction
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Displaying Reviews 1 - 5Back to Top

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Will this spark plug work on a CAT RP5500 generator
Verified Reply - Solomon
No Julian, this NGK Standard Spark Plug (CR5HSB) (Part # 6535) does not fit your CAT RP5500. The exact spark plug for your application is currently unavailable online. I would suggest that you visit the nearest Advance Auto Parts store to check the availability of this part.
Is this a good plug for moped
Verified Reply - Steve
Hi Donnie, I'm glad to help you! We can only look up by the vehicle. Since you didn't mention the specific vehicle, it's hard to tell for sure. To give you the correct information I would need the year, make, model and engine size of the vehicle.
Will this work in a 2003 Mercury Outboard 115hp ELPTO?
Verified Reply - Steve
Hi Rob, I'm glad to help you! This NGK Standard Spark Plug (Part # 6431) does not fit your 2003 Mercury Outboard 115hp ELPTO. The exact spark plug for your Outboard is currently unavailable online. I would suggest that you visit the nearest Advance Auto Parts store to check the availability of this part.
Equivalent to a small engine plug #794-00055A ?
Verified Reply - John the Car-Doc
Yes, Jorge! This NGK Standard Spark Plug (BM6F) - Part # 6221 is equivalent to an MTD Spark Plug # 794-00055A.
Can I pay at the store when I pick it up?
Verified Reply - Solomon
Hi Don, happy to help you! We do handle only technical questions regarding product fitments, specifications, diagnosis and repairs. For pay at store related inquiries, please feel free to call us at: 1-877-ADVANCE (238-2623) or contact our "Live Chat" support and one of our representatives will gladly assist you with any questions or concerns you may have.
Displaying Question & Answer 1-5

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