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NGK SILZNAR8C7H

SILZNAR8C7H NGK – Properties, Compatibility and Alternatives

The NGK SILZNAR8C7H represents a premium ignition component designed for high-performance automotive applications. This Spark plug NGK SILZNAR8C7H incorporates advanced electrode technology to deliver reliable spark generation under demanding operating conditions. Modern vehicles require precise ignition timing and consistent spark delivery to maintain optimal engine performance and fuel efficiency.

Advantages of the SILZNAR8C7H NGK

  • Enhanced durability through iridium electrode construction, providing extended service life compared to conventional copper alternatives
  • Superior heat dissipation properties ensure consistent performance across varying engine temperatures and operating conditions
  • Optimized electrode gap design delivers improved combustion efficiency and reduced emissions output
  • Advanced Spark plug SILZNAR8C7H NGK technology minimizes electrode wear and maintains stable ignition characteristics
  • Precision-engineered thread specifications ensure proper fitment and reliable electrical connection in compatible NGK SILZNAR8C7H spark plug applications
  • Corrosion-resistant materials protect against contamination and extend operational lifespan in harsh environments

Technical Data

Feature Value
Manufacturer NGK
Model NGK SILZNAR8C7H
Type Iridium IX
Thread size M14 x 1.25
Thread length 19mm
Wrench size 16mm
Heat range 8
Electrode gap 0.6mm
Resistance 5kΩ
Application High-performance engines

Compatibility and Areas of Application

This ignition component serves primarily in high-performance automotive applications where precise spark timing proves critical. The SILZNAR8C7H NGK spark plug design accommodates engines operating under elevated compression ratios and demanding thermal conditions. Applications include:

  • Turbocharged and supercharged engine configurations
  • High-compression naturally aspirated engines
  • Performance-oriented vehicle modifications
  • Racing and motorsport applications

Suitable for the following vehicle models and equivalents

Alternative products can be found on AUTODOC, where over 7000 items are currently available in the spark plugs category.

Car maker Car Model
Subaru WRX STI, Legacy GT
Mitsubishi Lancer Evolution
Nissan GT-R, 370Z
Honda Civic Type R, S2000

Application Notes and Important Questions

  • What torque specification should be applied during installation? Follow manufacturer recommendations, typically 25-30 Nm for M14 threads to prevent damage
  • How does the SILZNAR8C7H NGK heat range affect engine performance? The heat range 8 designation indicates suitability for high-temperature applications
  • Can this Spark plug NGK SILZNAR8C7H replace lower-grade alternatives? Yes, but verify compatibility with engine management systems and compression ratios
  • What maintenance intervals apply? Typically 30,000-60,000 miles depending on operating conditions and fuel quality

Conclusion

The NGK SILZNAR8C7H delivers exceptional ignition performance for demanding automotive applications through advanced iridium electrode technology. This component provides reliable spark generation and extended service life in high-performance engine configurations. The NGK SILZNAR8C7H represents a premium solution for enthusiasts seeking optimal ignition system performance.

500 items
NGK 93593 Spark plug M12 x 1,25, Spanner Size: 14 mm
Article number: 93593 Trade numbers: SILZNAR8C7H
Reviews - 50
  • Spark Plug: Iridium Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with taper gasket seat, Fixed SAE connector
  • Spanner Size: 14 mm
  • Thread Length [mm]: 25,0
  • Spark Position [mm]: 5,0
  • Thread Size: M12 x 1,25
  • Item number: 93593
  • Manufacturer: NGK
  • EAN number: 0087295935934
  • Condition: New
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In stock
-22%
compared to RRP £20.71

£15.99
Price per item
£63.96 / Price per 4 items

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  • Product line: V-Line
  • Spark Plug: Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat, Fixed SAE connector
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 4,0
  • Thread Size: M14 x 1,25
  • Item number: 3577
  • Manufacturer: NGK
  • EAN number: 0087295135778
  • Condition: New
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In stock
£1.59
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£6.36 / Price per 4 items

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NGK 7311 Spark plug M14 x 1,25, Spanner Size: 20,8 mm
Article number: 7311
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  • Spark Plug: Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat, Fixed SAE connector
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • Item number: 7311
  • Manufacturer: NGK
  • EAN number: 0087295173114
  • Condition: New
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In stock
£1.99
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£7.96 / Price per 4 items

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NGK 4028 Spark plug M14 x 1,25, Spanner Size: 20,8 mm
Article number: 4028
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  • Spark Plug: Connector Type SAE, Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 4,0
  • Thread Size: M14 x 1,25
  • Item number: 4028
  • Manufacturer: NGK
  • EAN number: 0087295140284
  • Condition: New
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£1.99
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£7.96 / Price per 4 items

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NGK 5950 Spark plug M14 x 1,25, Spanner Size: 16 mm
Article number: 5950
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  • Spark Plug: Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with taper gasket seat, Fixed SAE connector
  • Spanner Size: 16 mm
  • Thread Length [mm]: 7,8
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • Item number: 5950
  • Manufacturer: NGK
  • EAN number: 0087295159507
  • Condition: New
Details
In stock
-67%
compared to RRP £6.12

£1.99
Price per item
£7.96 / Price per 4 items

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NGK 2642 Spark plug M14 x 1,25, Spanner Size: 20,8 mm
Article number: 2642
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  • Spark Plug: Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat, Fixed SAE connector
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • Item number: 2642
  • Manufacturer: NGK
  • EAN number: 0087295126424
  • Condition: New
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£1.99
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£7.96 / Price per 4 items

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NGK 7023 Spark plug M10 x 1,0, Spanner Size: 16 mm
Article number: 7023
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  • Spark Plug: Connector Type M4, Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat
  • Spanner Size: 16 mm
  • Thread Length [mm]: 12,7
  • Spark Position [mm]: 1,5
  • Thread Size: M10 x 1,0
  • Item number: 7023
  • Manufacturer: NGK
  • EAN number: 0087295170236
  • Condition: New
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In stock
-69%
compared to RRP £7.55

£2.29
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£9.16 / Price per 4 items

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NGK 3725 Spark plug M14 x 1,25, Spanner Size: 20,8 mm
Article number: 3725
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  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 12,7
  • Spark Position [mm]: 3,5
  • Thread Size: M14 x 1,25
  • Item number: 3725
  • Manufacturer: NGK
  • EAN number: 087295137253
  • Condition: New
Details
In stock
-63%
compared to RRP £6.21

£2.29
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£9.16 / Price per 4 items

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NGK 6429 Spark plug M14 x 1,25, Spanner Size: 20,8 mm
Article number: 6429
Submit a review
  • Spark Plug: Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat, Fixed SAE connector
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 9,5
  • Thread Size: M14 x 1,25
  • Item number: 6429
  • Manufacturer: NGK
  • EAN number: 0087295164297
  • Condition: New
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In stock
-69%
compared to RRP £7.52

£2.29
Price per item
£9.16 / Price per 4 items

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NGK 7926 Spark plug M14 x 1,25, Spanner Size: 20,8 mm
Article number: 7926
Submit a review
  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 12,7
  • Spark Position [mm]: 4,5
  • Thread Size: M14 x 1,25
  • Item number: 7926
  • Manufacturer: NGK
  • EAN number: 0087295179260
  • Condition: New
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In stock
-69%
compared to RRP £7.39

£2.29
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£9.16 / Price per 4 items

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NGK 1270 Spark plug M14 x 1,25, Spanner Size: 16 mm
Article number: 1270
Submit a review
  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with taper gasket seat
  • Spanner Size: 16 mm
  • Thread Length [mm]: 7,8
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • Item number: 1270
  • Manufacturer: NGK
  • EAN number: 0087295112700
  • Condition: New
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In stock
-67%
compared to RRP £6.98

£2.29
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NGK 1097 Spark plug M14 x 1,25, Spanner Size: 20,8 mm
Article number: 1097
Submit a review
  • Spark Plug: with gasket seat, Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 1,0
  • Thread Size: M14 x 1,25
  • Item number: 1097
  • Manufacturer: NGK
  • EAN number: 0087295110973
  • Condition: New
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In stock
-66%
compared to RRP £6.87

£2.29
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NGK 5638 Spark plug M14 x 1,25, Spanner Size: 20,8 mm
Article number: 5638
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  • Spark Plug: Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat, Fixed SAE connector
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • Item number: 5638
  • Manufacturer: NGK
  • EAN number: 0087295156384
  • Condition: New
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£2.59
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£10.36 / Price per 4 items

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NGK 4632 Spark plug M14 x 1,25, Spanner Size: 20,8 mm
Article number: 4632
Submit a review
  • Spark Plug: Connector Type M4, Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 12,7
  • Spark Position [mm]: 3,5
  • Thread Size: M14 x 1,25
  • Item number: 4632
  • Manufacturer: NGK
  • EAN number: 0087295146323
  • Condition: New
Details
In stock (Item(s) left: 10)
-66%
compared to RRP £7.74

£2.59
Price per item
£10.36 / Price per 4 items

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  • Product line: V-Line
  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • Item number: 5637
  • Manufacturer: NGK
  • EAN number: 0087295156377
  • Condition: New
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In stock
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£11.96 / Price per 4 items

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  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • Item number: 7811
  • Manufacturer: NGK
  • EAN number: 0087295178119
  • Condition: New
Show OEM numbers of the product
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In stock
£2.99
Price per item
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  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 12,7
  • Spark Position [mm]: 3,5
  • Thread Size: M14 x 1,25
  • Item number: 4511
  • Manufacturer: NGK
  • EAN number: 0087295145111
  • Condition: New
Show OEM numbers of the product
Details
In stock
-19%
compared to RRP £3.72

£2.99
Price per item
£11.96 / Price per 4 items

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  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat
  • Spanner Size: 20,8 mm
  • Supplementary Info: BLISTER
  • Thread Length [mm]: 12,7
  • Spark Position [mm]: 3,5
  • Thread Size: M14 x 1,25
  • Item number: 92010
  • Manufacturer: NGK
  • EAN number: 0087295820100
  • Condition: New
Show OEM numbers of the product
Details
In stock
£2.99
Price per item
£11.96 / Price per 4 items

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  • Spark Plug: Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat, Fixed SAE connector
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • Item number: 7529
  • Manufacturer: NGK
  • EAN number: 0087295175293
  • Condition: New
Show OEM numbers of the product
Details
In stock
-6%
compared to RRP £3.50

£3.29
Price per item
£13.16 / Price per 4 items

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  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat
  • Spanner Size: 20,8 mm
  • Supplementary Info: BLISTER
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • Item number: 91406
  • Manufacturer: NGK
  • EAN number: 0087295814062
  • Condition: New
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Details
In stock (Item(s) left: 4)
£3.59
Price per item
£14.36 / Price per 4 items

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