NGK RE9B-T Iridium Spark Plug (Mazda RX-8, trailing)
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NGK RE9B-T iridium spark plug for the Mazda RX-8, in the trailing 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.
This is the secondary ignition spark plug for the rotary engine, which finishes the combustion process. It maintains the stock heat range and is always installed together with the leading ones.
Features
- Reference: RE9B-T (NGK 6701)
- Compatibility: Mazda RX-8 (13B-MSP Renesis), 2003 to 2012
- Position: trailing
- Heat range: 9, the same as the original
- Thread type: M14x1.25
- Thread length: 19 mm
- Wrench size: 20.8 mm
- Resistance: 5 kΩ
- Electrode gap: 1.2 mm
- Electrodes: 0.8 mm fine-wire iridium center and platinum tip on the ground electrode
- Mazda part number: N3Y1-18-110A
- Sales unit: per piece
- Brand: NGK
The RX-8's Renesis rotary engine uses four spark plugs: two for primary ignition, the leading (RE7C-L or RE8C-L), and two for secondary ignition, the trailing (RE9B-T). They are not interchangeable, so please check the position before purchasing.
It is advisable to replace 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 requires two of this position, so please indicate the appropriate quantity.