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NGK 4551 BR9HS-10 Standard Spark Plug 10-Pack

Manufacturer

Part Number

4551
Sale Price

$4.24

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

NGK 4551 BR9HS-10 spark plugs are standard copper core spark plugs trusted by automotive, motorcycle, and marine engine manufacturers worldwide. The unique copper core design and precision-engineered electrodes deliver reliable starts, optimal performance, and extended service life across a wide range of applications.

Key Features:

  • Solid Copper Core: Provides superior heat dissipation and electrical conductivity for consistent ignition
  • 99% Pure Alumina Silicate Insulator: Exceptional dielectric strength and thermal properties resist breakdown under extreme conditions
  • Triple Gasket Sealing Process: Eliminates combustion gas leakage past the shell for reliable compression
  • Corrugated Ribs: Prevents flashover and misfires by increasing insulation path length
  • Cold Rolled Threads: Protects cylinder head threads during installation and removal
  • Trivalent Plating: Silver chromate and zinc coating provides excellent corrosion resistance in harsh environments

This NGK BR9HS-10 spark plug features a 10mm thread diameter and is commonly used in high-performance small engines, motorcycles, and marine applications requiring a colder heat range. Sold as a standard 10-pack for convenient inventory management.

Products specifications

Stock Number

4551

Part Number

BR9HS-10

Ground Electrode Core Material

Nickel

Hex Size

13/16

Manufacturer Heat Range

9

Seat Type

FLAT

Center Electrode Tip Material

Nickel

Ground Electrode Quantity

1

Electrical Terminal Type

Removable Nut

Ground Configuration

Standard

Pre-Gap Size

.040

Center Electrode Core Material

Copper

Ground Electrode Tip Design

Standard

Insulator Height

55.00

Thread Diameter

14.00

Resistance

5000

Reach

.5

Great so far

Recieve in reasonable time.. Great deal

easy peasy. Not a problem.

smooth

Don't change a thing, its easy to navigate and the prices are great as well...

great PRICING, and DELIVERY. I'll use Autoplicity again !!

Ordered a couple of items. The first was a air intake kit. I had put in all my info for my truck and chose one from the list to order. Won't fit. Called to tell them and they asked if I had called manufacturer...ummm no. Said I needed to contact them to verify wrong part. They were closed, so went to website. The part they sent me was a universal fit- for cars, not trucks, but did find right model- $90 more. Called back autoplicity and was told I need to go through email to get an RA# to return wrong part- site says I can call. Been on hold for over 20 mins and still waiting. Hope the Nerf bars I ordered fit! Update- they called me back, got my RA#. Very pleased with how Nick handled things- it was what I expected the first time. He verified the NERF bars will fit and will be changing the website so the universal intake does not show on list for vehicles with larger air outlets. Changing my rating to show my satisfaction with how it was eventually handled.

Lowest prices of what I was looking for and super fast shipping!!

Great company best prices around and would highly recommend

So far all is well. I am very happy. Just a side note, I did just place my order. I haven't actually received the product. This is an update. I am a very happy shopper. The only complaint I have is when I would check on my order to see if it had been ship

Product was a good price, fast shipping and great costumer service! will do business again!

"Customer service was very helpful, very good prices. On its way the next day."

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