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HKS Super Fire Racing MR40XLB Spark Plug - Toyota GR Supra (A90) 2020-2025

HKS SKU: HKS50003-MR40XLB
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HKS Super Fire Racing MR40XLB spark plug from the M series, with a heat range of 8 on the NGK scale. It pairs a 0.6mm ruthenium alloy center electrode with a platinum tipped, copper core ground electrode in a resistor plug body with an M12 thread, 26.5mm reach and compact 14mm Bi-HEX. Sold individually, so order one per cylinder.

Specifications

Type Spark plug (HKS Super Fire Racing M series)
Heat Range 8 (NGK scale)
Thread M12
Reach 26.5mm
Hex 14mm Bi-HEX
Center Electrode 0.6mm ruthenium alloy
Ground Electrode Platinum tipped, copper core
Resistor Yes
Quantity 1 (sold individually)
Part Number 50003-MR40XLB

This part fits:

Year Make Model Submodel
2020-2025 Toyota GR Supra 3.0L B58

Shipping

  • Orders placed before 3 PM ET 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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