HKS M-Series Spark Plugs Heat Range 10.5 for Rotary Applications

HKS Super Fire Racing M525RE Iridium Spark Plug (NGK 10.5, Rotary) - 10 Pack

HKS SKU: HKS50003-M525RE
Price
5% OFF
/
Currently on Backorder – Contact Us for Availability
Shipping calculated at checkout.

The HKS Super Fire Racing M525RE is an RE-type iridium spark plug with an NGK 10.5 equivalent heat range, designed specifically for rotary engines (Mazda 13B / RX-7 / RX-8). The RE design uses a straight platinum outer electrode tailored to the rotary combustion cycle for reliable ignition, paired with a 0.6 mm iridium center electrode. The very cold heat range suits high-boost and high-RPM rotary builds. Sold as a 10-pack (wholesale case); a typical rotary needs multiple plugs (leading/trailing per rotor).

Specifications

Brand HKS
Product Line Super Fire Racing M-Series (RE rotary)
Heat Range NGK 10.5 equivalent
Seat / Type RE type (rotary)
Thread φ14 x 21.5 mm
Hex (Wrench) 20.8 mm
Center Electrode 0.6 mm iridium (straight platinum outer)
Application Rotary engines (Mazda 13B / RX-7 / RX-8)
Quantity 10 plugs (case)
Recently viewed
You may also like