Originally Posted by cobbcustomz
i have a ZEX system hooked up to my 99 EX. no change in plugs or timing and havent had any issues in almost 3 years
usage is a big factor here.. can you also state how much you use it or how many bottle's full you have put through your engine.
I personally put 5 bottles through my d16z6 before with upgraded fuel system & plugs & had no problems. Then swapped.