here in the uk they work out to about $10,same price as the GO plugs so cost isnt relevant really,just want something thats going to last.

when the engine is on the sweetspot the T3 plug seems to go off very quickly,maybe half a gallon if that and then the engine starts to go boggy as the plug starts dying..

as i said with 25% no problems,and thats with the extra shim in,ive got some OD 97T's ordered but i have a buggy national this weekend so get that out of the way then test the plugs.