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BRISK Silver Racing D12S Spark Plug 14mm thread, 3/4"(19mm) reach, 5/8'(16mm) hex, gasket seat, non-projected tip, non-resistor, fine wire 1.5mm Silver center el., cut-back ground electrode -Silver Center Electrode -Cut-Back Ground Electrode -Special High Dialectric Strength Insulator -Special Design for Hard to Ignite Fuels -Silver is the Best Electric and Heat Conductor -Superior Ignition Ability Increases Engine POWER -Lower Required Supplied Ignition Voltage -Good Resistance to Fouling and Easier Starts -Race Engines and Engines with Hard to Ignite Fuels -Supercharged/Turbocharged/Nitrous Engines -Excellent for Total Loss Ignition Systems Brisk Silver Racing Spark Plug D12S replaces: -standard NGK R5671A-8 spark plug (NGK stock#4554) -NGK Racing plug R7114-8 -NGK Racing plug 4075 R7238-8 -NGK Racing plug R7118-8 -NGK Racing plug R7119-8 -NGK Racing plug 4892 R7434-8 -Autolite Racing series AR3934 -Denso Racing 5701 IK01-24 -Champion Racing series 283 C63 -Champion Racing series 688 C61 REPLACES: R5671A-8
Unless your application is directly listed, please check to insure the plug yuo are ordering fits. Many applications listed are "universal" and listed to fit "all bikes" . Unless stated, these plugs may or may not fit your application. Brisk Catalog