NISMO Iridium Spark Plugs For Bluebird U14 SR18DE QG18DE SR20DE SR20VE 22401-RN010-6/7/8 EXHAUST KIT Middle RPM Sound Stock: 73dB

Middle RPM Sound Stock: 73dB -> Fujitsubo: 79dB

3ps) / 6710rpm -> Fujitsubo: 130

Mid RPM Acceleration Sound Stock: 101dB -> Fujitsubo: 103dB

Improve the workability during the air injection time and sparging by placing the air valve on the diagonal

NISMO Iridium Spark Plugs For Bluebird U14 SR18DE QG18DE SR20DE SR20VE 22401-RN010-6/7/8 EXHAUST KIT Middle RPM Sound Stock: 73dBBrand NISMO Series Name Iridium Spark Plugs Product Descriptions performance. The Iridium Spark Plug produces much more complete combustion, which delivers more power and response to the driver. It helps to draw out the full potential of an engine. The thermo edge set at the top of the insulator limits the deposition of carbon, which otherwise can reduce firing performance and cause poor idling. This also increases reliability and durability. Product