1EA SPECIAL "TWIN FIRE" 2 ELECTRODE RACING SPARK PLUG REF C7HSA C8HSA (TFC8HSA)
 "TWIN_FIRE"  RACING SPARK PLUG
 
 
PICK_HEAT_RANGE_HERE C7H-NORMAL C8H-COOLER
 
+  LARGER AND QUICKER FLAME KERNEL
 
+  SPARK OPENS TOWARDS FRONT AND TOP
 
+  FLAME KERNEL NOT BLOCKED BY GROUND ELECTRODE !!
 
SO,,, ALL THESE THINGS HELP IMPROVE COMBUSTION OF THE GAS AIR MIXTURE!!
 
 
THE MFG. SUGGESTS 50CC TO 70CC TO USE THE "7" HEAT RANGE PLUGS
 
85CC TO 110CC TO USE THE "8"
 
THEY ARE THE SAME REACH AND DIAMETER AS THE STOCK NGK PLUGS LIKE THE C7HSA ...
 
what one of our good customers said ...........
 
Just an FYI..... I was running on the dyno this weekend and I ran with a standard ngk on my 88 kit then I ran your twin fire a few seconds later and got .3hp more....
 
I thought that was interresting....