SKU: 979373056

NGK Spark Plug - BU8H

$82.66 $91.85
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Description

NGK Spark Plug - BU8HVehicle Fitment & Part Details This NGK spark plug (BU8H) is supplied as an OEM grade replacement. Heat range 8. Thread M14 x 1,25. Verify VIN engine before ordering. Key Details SKU BU8H Component Spark Plug Brand NGK Heat Range 8 Part MPN 6431 GTIN Barcode 087295164310 Trade Numbers BU8H Product Specifications Thread Size M14 x 1,25 Thread Length [mm] 12,7 Spanner Size 20,8 mm Spark Position [mm] 0,3 Electrode Construction Nickel Middle Electrode,

Vehicle Fitment & Part Details

This NGK spark plug (BU8H) is supplied as an OEM-grade replacement. Heat range 8. Thread M14 x 1,25. Verify VIN/engine before ordering.

Key Details

SKU
BU8H
Component
Spark Plug
Brand
NGK
Heat Range
8
Part MPN
6431
GTIN / Barcode
087295164310
Trade Numbers
BU8H

Product Specifications

Thread Size
M14 x 1,25
Thread Length [mm]
12,7
Spanner Size
20,8 mm
Spark Position [mm]
0,3
Electrode / Construction
Nickel Middle Electrode, Surface Spark, no interference suppression, with gasket seat, Fixed SAE connector
Brand Class
Premium

Vehicle Compatibility

Verify VIN/engine and confirm the correct heat range and electrode design for your specific application before ordering.

OEM Reference Numbers

Aftermarket Equivalents

  • Champion: L6VC, QL6VC
  • Denso: SF24, MERCURY, 8M0176682, 136 86 B2, 136 86 Q, 896329885
Alternate OEM Search References: 13686B2, 13686Q

Fitment Notes

  • Always match heat range, thread size and electrode design before ordering. Verify VIN/engine.

Important: Spark plugs are not returnable, exchangeable, or refundable once fitted. Confirm you are ordering the correct part for your vehicle. Compare the new spark plug to the removed plug for thread reach, thread diameter, hex size, electrode style, gap specification, and heat range before fitting. Mismatched spark plugs can cause misfires, pre-ignition, detonation, fouling, or engine damage.

Returns Notice: Once a spark plug has been fitted or threaded into a cylinder head, it cannot be returned, exchanged, or refunded under any circumstances.

Installation / Use / Maintenance Tips

  • Allow the engine to cool fully before removal - cylinder heads are easily damaged when warm.
  • Use the correct deep-socket plug spanner (20,8 mm) and avoid impact tools.
  • Inspect the existing plug for fouling, oil contamination, or worn electrodes - may indicate engine condition issues.
  • Verify the gap if your supplied plug is not factory-set; consult your service manual for the correct value.
  • Apply a small amount of anti-seize to the threads (sparingly) and torque to manufacturer specification.

Common Questions

Will this NGK spark plug fit my your vehicle?
This part (BU8H) is listed for the applications shown on this page. Always confirm the correct heat range, thread size and electrode design against your vehicle's service manual or a parts lookup before ordering. Verify VIN/engine.

What does the NGK part code mean?
The NGK trade number encodes physical and performance characteristics - thread/reach, electrode design, heat rating, and projection. Each digit and letter has meaning in NGK's naming convention. The heat range is usually the standalone digit (e.g. BPR6ES is heat range 6).

What is the difference between this NGK plug and a Bosch / Champion / Denso equivalent?
The cross-references listed under OEM Reference Numbers are functionally equivalent for the same applications, but materials, electrode design and heat dissipation can differ slightly. NGK is OEM-supply quality and most manufacturers specify NGK or Denso as their factory plug.

How do I confirm fitment if my engine variant isn't listed?
Match the supplied thread size, reach, electrode design and heat range against your existing plug. If unsure, request fitment assistance before ordering.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 979373056

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4.1 ★★★★★
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S
Verified Purchase
S_
Carnegie, US
★★★★★ 5
Just buy it and you will love it
Color: Khaki
Amazing chair. It looks as expected. Perfect fit for my needs. It has great lumbar support and value of my money. There is no squealing noise and pretty strong and sturdy. I am 5 feet and 8 inches and fits for me. Very easy to setup. I love that they have given extra and back up screwes for every component. Easy setup for one person and very easy setup for two people. I was able to set this up under 20 minutes. Screws and instructions are on the box and inside the seat package. Overall good purchase and happy customer and will update after couple of months.
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Reviewed in the United States on April 20, 2026
R
Verified Purchase
R. Jernigan
Boise, US
★★★★★ 4
A step up, but still room for improvement
Color: Cream Khaki (Pu Leather Seat)
Yikes, the *shilling* on the reviews for this thing! Yes, it's a chair. There are a lot of mesh-backed office chairs for sale here. None of them are likely to change your life. I can say this chair is a step up in quality from the few others I've purchased online in the past. All hardware below the seat cushion is heavy steel; you won't be breaking this stuff in the near future--and it's a nice change from the almost-entirely-plastic offerings I see elsewhere. The provided hardware was packaged intelligently: it's all screws (and not too many of them) with various lengths, but they all have the same size hex-head and the package includes a nice matching T-bar to install them; moreover, if you follow the instructions it's basically "use the screws labelled Step 1 now" then "use the screws labelled Step 2 now"--hard to get wrong. The best part of the chair is the lumbar support. It's why I selected this particular variant, and it was a good choice: it's firm and adjustable and makes a difference. The back is comfortable, and the general motion of the chair (rocking, locking, up/down, swivel, roll) is exactly as you'd expect. I don't like arms on my chairs: when they're down I rest my elbows there but they're always too high so it bothers my shoulders eventually, and when they're up my elbows bump into them. So I usually remove the arms entirely during assembly--and in this chair that wasn't too hard, but it does leave some slightly unsightly connection points hanging free. That's not a mark against the chair itself--just letting you know; at worst I could point out that this chair's arm movement is maybe a little more limited than usual. The worst thing about this chair, though, is the cushion. I got the leatherette seat, because it's supposed to be comfortable and easy to clean. In practice it's *not* comfortable at all: it's soft enough, sure, but it's also *very* hot and makes me squirm repeatedly to try to improve my comfort the longer I sit here. I suggest getting the mesh-bottom version, if you're going to get this model.
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Reviewed in the United States on March 30, 2026
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Karina
Lake Worth, US
★★★★★ 5
Ergonomic Desk Chair
Color: Nori Black (Pu Leather Seat), Color: Nori Black (Pu Leather Seat)
I am delighted with this chair. First of all, assembly was super easy, thanks to the instructions included in the box. The faux leather design combined with the mesh backrest gives it an elegant look while ensuring comfort. I love its size, it is substantial enough to feel supportive, yet not so bulky that it takes up too much space; this allows it to fit perfectly under my desk and helps me save room. The lumbar support makes it comfortable to work at my desk for hours on end, and I really appreciate that the armrests can be easily raised and lowered. It is incredibly comfortable and durable.
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Reviewed in the United States on June 3, 2026
I
Verified Purchase
Inna Herasymchuk
Bozeman, US
★★★★★ 5
Definitely happy with this purchase!
Color: Nori Black (Pu Leather Seat), Color: Nori Black (Pu Leather Seat)
I’m really impressed with the MUXX.STIL Office Chair. I wanted something comfortable for long work days but also stylish enough to fit nicely into my space, and this chair ended up being exactly what I was looking for. The PU leather looks sleek and elegant, and the chair feels much more premium than I expected. It’s comfortable even after sitting for hours, with great back support and a soft cushion that doesn’t flatten out quickly. I also love how smoothly it rolls and adjusts. As someone who spends a lot of time working, editing content, and answering messages at my desk, having a comfortable chair truly makes a difference — and this one does. It made my workspace feel more put together and cozy at the same time. Definitely happy with this purchase!
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Reviewed in the United States on May 26, 2026
M
Verified Purchase
M
Omaha, US
★★★★★ 3
Nice-ish chair but not what I expected.
Color: Grey
Nice chair basically, good looking, and assembly went well, the wheels roll very nicely, lumbar support is good too, with comfy seat back. However, the "seat cushion" design itself is very odd, because the seat cushion is much thicker at the rear than it is at the front, thus you're constantly slipping off forward, always needing repeatedly to lift up and get back on the seat up further where you belong; while the seat tilt adjustments are of no help with this problem, no matter what setting you will be slipping off forward. The lever for adjusting reclining ability is very cumbersome and awkward to use. The arm rests are ok, comfy, but lack the ability to raise or lower, all you can do if flip it up totally out of your way. I wish I could return and exchange this chair for something better but there is no way this could easily be disassembled and returned in the box that is long since gone. This came in a box really super efficiently and very tightly packed, give them credit and kudos for the great packing design. Maybe, hopefully, the manufacturer has some suggestions for replacement when they see this review.
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Reviewed in the United States on November 7, 2025

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