just throwing my experience out there.

not sure whwat else it will work for but after doing research i was suggested a bottle of (guarenteed to pass) cost me about $12.


i failed deq for HC first attempt. was 295 HC, passing is a 220 here in oregon.

i followed the directions on the bottle and when i went back to deq. i got a 38 HC and my CO also went down though i alrdy passed that.


so if anyone is having trouble passing i HIGHLY reccomend this product.

also if you fail and the problem isnt related to your cat or a couple other things. they will double your money back