HKS M-Series Spark Plugs for Nissan/Infiniti VQ35HR Stock Heat
HKS M-Series Spark Plugs for Nissan/Infiniti VQ35HR Stock Heat
HKS M-Series Spark Plugs for Nissan/Infiniti VQ35HR Stock Heat
HKS M-Series Spark Plugs for Nissan/Infiniti VQ35HR Stock Heat

HKS Super Fire Racing M40HL Iridium Spark Plug (NGK 8) - Nissan/Infiniti VQ35HR - 10 Pack

HKS SKU: HKS50003-M40HL
Price
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The HKS Super Fire Racing M40HL is an HL-type iridium spark plug with an NGK 8 equivalent heat range (stock heat) for the Nissan/Infiniti VQ35HR 3.5L engine. The M12 long-reach, 14 mm hex design suits the VQ35HR, and the 0.6 mm iridium center electrode with platinum-chip outer electrode provides strong ignition and long service life while resisting carbon fouling. A direct performance upgrade at the factory heat range. Sold as a 10-pack (wholesale case); a typical engine needs one plug per cylinder.

Specifications

Product Line Super Fire Racing M-Series
Heat Range NGK 8 equivalent (stock heat)
Seat / Type HL type (M12 long reach)
Thread φ12 x 26.5 mm
Hex (Wrench) 14 mm
Center Electrode 0.6 mm iridium
Application Nissan / Infiniti VQ35HR 3.5L
Quantity 10 plugs (case)
Part Number 50003-M40HL

Shipping

  • Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
  • Standard, expedited, and overnight options at checkout.
  • Oversized items ship by freight and take longer.
  • Special order items follow a lead time we confirm with you individually before the order is committed.
  • Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
  • Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
  • International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

  • 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
  • Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
  • Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
  • Product images may be representative. The SKU and specifications in the listing are what ships.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty
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