NGK RE8C-L Iridium Spark Plug (Mazda RX-8, leading)
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NGK RE8C-L iridium spark plug for the Mazda RX-8, in the leading position. It is specifically designed for the 13B-MSP Renesis rotary engine, featuring a fine-wire iridium center electrode that provides a powerful spark and wears down very slowly.
Being one heat range colder than the factory plug, it is the choice for tuned engines or intensive track use, where the chamber reaches higher temperatures. It also improves cold starting.
Specifications
- Reference: RE8C-L (NGK 5745)
- Compatibility: Mazda RX-8 (13B-MSP Renesis), from 2003 to 2012
- Position: leading
- Heat range: 8, one degree colder than the original
- Thread type: M14x1.25
- Thread length: 21 mm
- Wrench size: 20.8 mm
- Resistance: 5 kΩ
- Electrodes: fine-wire iridium center and platinum ground electrode tip
- Sale: per unit
- Brand: NGK
The Renesis rotary engine in the RX-8 uses four spark plugs: two main ignition, the leading (RE7C-L or RE8C-L), and two secondary ignition, the trailing (RE9B-T). They are not interchangeable, so check the position before buying.
It is recommended to change them every 30,000 km at most, and sooner if the car is used on the track. Worn spark plugs in a rotary engine are immediately noticeable in hot starts and apparent loss of compression.
The RX-8 needs two of this position, so please indicate the appropriate quantity.