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181000+ Parts & Accessories
Our catalogue has grown extensively over the years and we now source a huge range of parts and accessories from a number of distributors from round the world.

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Simple Exchange Or Refund Policy 
We know when customers receive their orders there is always the possibility of needing to exchange or return items for a refund. Rest assured if you need to, we make it simple. See T&C's for more details.

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Price Match Promise 
We offer a price match promise on all items we sell. Use the "Seen it cheaper?" option found on the product pages to request a price match.

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ARH Custom Custom Motorcycle Parts and Accessories ARH Custom Custom Motorcycle Parts and Accessories

NGK Spark Plugs Spark Plug Laser-platinum PMR8B (6378)

  • NGK Spark Plugs Spark Plug Laser-platinum PMR8B (6378)vehicle specific
$35.55
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Seen it cheaper elsewhere?

Our Price Promise

Seen this item cheaper on another website? Let us try and match it!

We do our upmost to keep our prices competitive but due to the number of items we sell, you may occasionally find a better price advertised elsewhere. If you have seen a cheaper price on another website let us know by filling in this form. If we’re able to match the price, we’ll look to respond via email with a unique discount code within 1 hour (during working hours) so you're not waiting too long.

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Please note:

  1. The item must be identical to the one on our website listing and must show as being available.
  2. Price match applies to items sourced from authorised UK retailers only, not private sellers.
  3. Prices will only be matched from UK based websites with prices in GBP.
  4. ARH Custom reserve the right to price match only one of each item per customer.
  5. ARH Custom reserve the right to withdraw the price match policy at any time.

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Estimated shipping date between 26 Jun and 1 Jul.

Usually ships in 3-6 business days

All orders are shipped out of our UK premises. Estimated shipping date between 26 Jun and 1 Jul.

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Spark Plug

  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
  • Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer
  • Triple seals prevent leakage
  • Corrugated ribs prevent flashover
  • Copper core aids in heat removal

Specifications +

Electrode Tip Material: Platinum
Ground Electrode Configuration: Single
Terminal Configuration: Solid Terminal
Thread Size: 10 mm
Hex Size: 16 mm (5/8")
Units: Each
Electrical Resistance: 5k Ohms
Center Electrode Projection: Projected
Ground Electrode Shape: Standard
Model: PMR-8B
Spark Gap Imperial: 0.028"
Spark Gap: 0,7 mm (0,028")
Style: Laser Platinum
Product Name: Spark Plug
Center Electrode Type: Standard
Type: Resistor
Heat Range: 8
Spark Gap Metric: 0.7 mm
Thread Reach: 19,1 mm (3/4")

Part numbers +

  • 21030173

Fitment +

    APRILIA
  • ATLANTIC 250 I.E: 2007-2009
  • SCARABEO 250: 2004-2010
  • SPORTCITY 250 I.E: 2007-2008
  • DERBI
  • GP1 250 I: 2007-2009
  • RAMBLA 250 I: 2008-2009
  • GILERA
  • NEXUS 250: 2007-2008
  • MALAGUTI
  • MADISON 3 250 I.E: 2008-2011
  • MOTO GUZZI
  • BELLAGIO 940: 2008-2013
  • BELLAGIO 940 Aquila Nera: 2011-2015
  • BELLAGIO 940 Deluxe: 2010-2011, 2014-2015
  • BREVA 1100: 2006-2011
  • BREVA 1100 ABS: 2006-2007, 2011
  • BREVA 1200: 2008-2011
  • BREVA 1200 ABS: 2008-2011
  • BREVA 1200 SPORT: 2008-2009
  • BREVA 850: 2007-2009
  • BREVA 850 ABS: 2007-2009
  • CALIFORNIA 1100 90 Anniversary: 2012
  • CALIFORNIA 1100 AQUILA NERA: 2011
  • CALIFORNIA 1100 CLASSIC: 2006-2011
  • CALIFORNIA 1100 TOURING: 2006-2008
  • CALIFORNIA 1100 VINTAGE: 2006-2012
  • GRISO 1100: 2005-2008
  • GRISO 1200 8V: 2007-2013
  • GRISO 1200 8V SE: 2011-2016
  • NORGE 1200: 2006-2008
  • NORGE 1200 ABS: 2006-2008
  • SPORT 1200: 2007-2008
  • SPORT 1200 4V: 2009-2012
  • SPORT 1200 4V ABS: 2009
  • SPORT 1200 4V S.E: 2012
  • SPORT 1200 ABS: 2007-2008
  • STELVIO 1200 4V: 2008-2010
  • STELVIO 1200 4V ABS: 2008-2010
  • STELVIO 1200 4V NTX: 2009-2010
  • STELVIO 1200 4V NTX ABS: 2009-2010
  • V11 1100 Coppa Italia: 2005
  • V11 1100 LE MANS: 2006
  • V11 1100 LE MANS Catalysator: 2005
  • V11 1100 LE MANS Nero Corsa: 2005
  • V11 1100 LE MANS Rosso Corsa: 2005
  • V11 1100 SCURA R: 2005
  • V11 1100 SPORT Ballabio: 2005-2006
  • V11 1100 SPORT Cafe: 2005
  • PEUGEOT
  • GEOPOLIS 250: 2006
  • GEOPOLIS 250 ABS Executive: 2007-2009
  • GEOPOLIS 250 ABS Urban: 2009-2010
  • GEOPOLIS 250 Premium: 2007-2010
  • GEOPOLIS 250 Premium RS: 2007-2010
  • SATELIS 250: 2006
  • SATELIS 250 ABS Executive: 2007-2010
  • SATELIS 250 ABS Urban: 2011-2012
  • SATELIS 250 Premium: 2007-2012
  • SATELIS 250 Premium RS: 2008-2012
  • PIAGGIO
  • BEVERLY 250: 2004-2007
  • BEVERLY 250 I.E: 2007-2008
  • BEVERLY 250 I.E. Cruiser: 2007-2008
  • BEVERLY 250 I.E. Tourer: 2008-2009
  • BEVERLY 250 RST: 2004-2007
  • CARNABY 250: 2009
  • MP3 250: 2006-2014
  • MP3 250 I.E: 2009
  • MP3 250 I.E. Mic: 2008-2009
  • MP3 250 LT I.E: 2008-2009
  • X7 250 I.E: 2007-2009
  • X8 250 I.E: 2006-2007
  • X9 250 Evolution: 2007
  • VESPA
  • GTS 250 I.E: 2005-2012
  • GTS 250 I.E. ABS: 2006-2010
  • GTV 250 I.E: 2007-2012
  • GTV 250 I.E. GT60 Limited Edition: 2007

Delivery +

All orders are shipped with either DPD, Fedex, UPS, DHL or Royal Mail. The courier used to ship your order is determined by ourselves once your order has been placed and normally depends on the size, volume and the shipping destination. The selected courier for your order will be quoted in your order confirmation email which you will receive once we have processed your order. Once your order has been shipped, this will be confirmed via email and you will receive a tracking number so you can keep an eye on your shipments progress.

Back In Stock Notification

Send us your email and we'll notify know when this item is available.


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Shipping Cost

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