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Description
HKS Super Fire Racing Spark Plug 50003-M525REM Series Super Fire Spark Plugs HKS M Series spark plugs are high performance Iridium plugs designed to provide improved ignition performance, durability and anti carbon build up. 0. 6mm Iridium Alloy Center Electrode Outer Electrode with Platinum Chip Short Type Outer Electrode (Anti Vibration) Thermal Edge Spark Support Gap M Series is recommended for reliable ignition, durability and anti carbon buildup under high load. The Iridium alloy is used
M-Series Super Fire Spark Plugs
HKS M-Series spark plugs are high performance Iridium plugs designed to provide improved ignition performance, durability and anti-carbon build-up.
- 0.6mm Iridium Alloy Center Electrode
- Outer Electrode with Platinum Chip
- Short Type Outer Electrode (Anti-Vibration)
- Thermal Edge
- Spark Support Gap
M Series is recommended for reliable ignition, durability and anti-carbon buildup under high load.
The Iridium alloy is used because of its durability and reliability. On an average plug, a narrow core typically shortens life span of plug but with the intense durability of iridium there is no sacrifice in any longevity. With a high melting point of 2454 degrees C, opposed to the 1769 degrees C of white gold, the electrode can tolerate the high levels of compression and minor knocking without any deterioration. A nickel coating on the housing also prevents the spark plug from premature deterioration. The Iridium plugs are available for multiple applications and offered in "colder" heat ranges of 7 and up and specifically for rotary, heat ranges of 9 and up are offered.
Heat Range: NGK # 10.5
Thread Size: 14mm × 12.7mm
Wrench Size: 20.8mm
Fits:
| 1983 - 1985 | MAZDA | RX-7 | ALL | ALL | From 10/1983 Thru 9/1985 Production Date | SA22C Chassis | Stock Plug/Heat Range: ROTARY:9 |
| 1985 - 1988 | MAZDA | RX-7 | R2 | 1.3 | From 10/1985 Thru 8/1988 Production Date | FC3S/FC3C Chassis | Stock Plug/Heat Range: ROTARY:10,11 |
| 1988 - 1991 | MAZDA | RX-7 | R2 | 1.3 | From 9/1988 Thru 12/1991 Production Date | FC3S/FC3C Chassis | Stock Plug/Heat Range: ROTARY:7,9 |
| 1993 - 1995 | MAZDA | RX-7 | R2 | 1.3 | From 12/1991 Thru 8/2002 Production Date | FD3S Chassis | Stock Plug/Heat Range: ROTARY:7,9 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy