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Europe, UK: Wednesday, Nov 11
USA: Monday, Nov 9
Australia: Wednesday, Nov 11
Asia: Monday, Nov 9
UAE: Tuesday, Nov 10
Order within 23 Hours 51 mins with Scheduled Delivery. If you place an order within this time, We will ship on Monday, Nov 9 2026. This delivery time is calculated by DHL & Fedex. You can check the exact delivery date on checkout page.
USA: Monday, Nov 9
Australia: Wednesday, Nov 11
Asia: Monday, Nov 9
UAE: Tuesday, Nov 10
Order within 23 Hours 51 mins with Scheduled Delivery. If you place an order within this time, We will ship on Monday, Nov 9 2026. This delivery time is calculated by DHL & Fedex. You can check the exact delivery date on checkout page.
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[Screw part 12 x 26.5 mm / Wrench 16 mm Heat range equivalent to NGK No. 8 / Long reach type for light and compact cars] This is HKS's Super Fire Plug Type-M, 50003M40XL. This is the strongest plug, enhanced with improved ignition performance, durability, and fouling resistance, bringing out the performance of tuned engines and also effective for normal engines, thanks to the selection of materials and a newly designed shape. By adopting a 0.6 mm iridium alloy center electrode, the required voltage is reduced, and combined with the platinum square tip ground electrode, it improves ignition performance while also being highly durable, and the tip is shortened and tapered to secure the volume of space. By providing a thermo edge + auxiliary spark gap at the tip of the insulator, a minute discharge is generated to burn off accumulated carbon and prevent misfires that occur in various combustion environments.
・Furthermore, because rotary engines meet different performance requirements than reciprocating engines, a specially designed RE type with a storage-shaped platinum ground electrode is used to ensure reliable ignition.
・For manufacturer compatibility, please see HKS SUPER FIRE RACING M series LINE UP Plug Type Screw Size Wrench Size Heat Range Part Number 4-piece set JIS Type φ14×19mm 16mm NGK No. 7 equivalent 50003-M35 50003-M35-4 NGK No. 8 equivalent 50003-M40 50003-M40-4 NGK No. 9 equivalent 50003-M45 50003-M45-4 ISO Type φ14×19mm 16mm NGK No. 7 equivalent 50003-M35i 50003-M35i-4 NGK No. 8 equivalent 50003-M40i 50003-M40i-4 NGK No. 9 equivalent 50003-M45i 50003- M45i-4G type φ14×19mm 20.8mm NGK equivalent to #7 50003-M35G 50003-M35G-4 NGK equivalent to #8 50003-M40G 50003-M40G-4 NGK equivalent to #9 50003-M45G 50003-M45G-4X type φ12×19mm 16mm NGK equivalent to #8 50003-M40X 50003-M40X-4XL type φ12×26.5mm 16mm NGK equivalent to #9 50003-M45XL 50003-M45XL-4 NGK equivalent to #8 50003-M40XL 5000 3-M40XL-4 Long reach type φ14×26.5mm 16mm Equivalent to NGK No. 7 50003-M35iL 50003-M35iL-4 Equivalent to NGK No. 8 50003-M40iL 50003-M40iL-4 Equivalent to NGK No. 9 50003-M45iL 50003-M45iL-4 HL type φ12×26.5mm 14mm Equivalent to NGK No. 8 50003-M40HL 50003-M40HL-4 Equivalent to NGK No. 9 50003-M45HL 50003-M45HL-4 Equivalent to NGK No. 10 50003-M50HL50 003-M50HL-4 Conical Sheet Long Reach φ14×25mm 16mm Equivalent to NGK No. 7 50003-M35LF 50003-M35LF-4 Equivalent to NGK No. 8 50003-M40LF 50003-M40LF-4 RE Type φ14×21.5mm 20.8mm Equivalent to NGK No. 9 50003-M45RE 50003-M45RE-4 Equivalent to NGK No. 10 50003-M50RE 50003-M50RE-4 Equivalent to NGK No. 10.5 50003-M525RE 50003-M525RE-4
Product Category Claire Online Shop Parts Electronic Parts Spark Plug Single Item Car, Motorcycle, Bicycle Automotive Ignition System Parts Spark Plug
JAN/ISBN Code: 4957266720424
Product Code: 50003m40xl
Tags:
・Furthermore, because rotary engines meet different performance requirements than reciprocating engines, a specially designed RE type with a storage-shaped platinum ground electrode is used to ensure reliable ignition.
・For manufacturer compatibility, please see HKS SUPER FIRE RACING M series LINE UP Plug Type Screw Size Wrench Size Heat Range Part Number 4-piece set JIS Type φ14×19mm 16mm NGK No. 7 equivalent 50003-M35 50003-M35-4 NGK No. 8 equivalent 50003-M40 50003-M40-4 NGK No. 9 equivalent 50003-M45 50003-M45-4 ISO Type φ14×19mm 16mm NGK No. 7 equivalent 50003-M35i 50003-M35i-4 NGK No. 8 equivalent 50003-M40i 50003-M40i-4 NGK No. 9 equivalent 50003-M45i 50003- M45i-4G type φ14×19mm 20.8mm NGK equivalent to #7 50003-M35G 50003-M35G-4 NGK equivalent to #8 50003-M40G 50003-M40G-4 NGK equivalent to #9 50003-M45G 50003-M45G-4X type φ12×19mm 16mm NGK equivalent to #8 50003-M40X 50003-M40X-4XL type φ12×26.5mm 16mm NGK equivalent to #9 50003-M45XL 50003-M45XL-4 NGK equivalent to #8 50003-M40XL 5000 3-M40XL-4 Long reach type φ14×26.5mm 16mm Equivalent to NGK No. 7 50003-M35iL 50003-M35iL-4 Equivalent to NGK No. 8 50003-M40iL 50003-M40iL-4 Equivalent to NGK No. 9 50003-M45iL 50003-M45iL-4 HL type φ12×26.5mm 14mm Equivalent to NGK No. 8 50003-M40HL 50003-M40HL-4 Equivalent to NGK No. 9 50003-M45HL 50003-M45HL-4 Equivalent to NGK No. 10 50003-M50HL50 003-M50HL-4 Conical Sheet Long Reach φ14×25mm 16mm Equivalent to NGK No. 7 50003-M35LF 50003-M35LF-4 Equivalent to NGK No. 8 50003-M40LF 50003-M40LF-4 RE Type φ14×21.5mm 20.8mm Equivalent to NGK No. 9 50003-M45RE 50003-M45RE-4 Equivalent to NGK No. 10 50003-M50RE 50003-M50RE-4 Equivalent to NGK No. 10.5 50003-M525RE 50003-M525RE-4
Product Category Claire Online Shop Parts Electronic Parts Spark Plug Single Item Car, Motorcycle, Bicycle Automotive Ignition System Parts Spark Plug
JAN/ISBN Code: 4957266720424
Product Code: 50003m40xl
Tags: