i brought one for my 7010, saved a little fuel but did gain anything at all, took it off one day and i could run faster on the same field. the next day i pluged it back in just to check again nothing better. long story short i send it back, still waitting for an answer back. in the mean time i had to buy a new ecm and put new terminals in the wireing harness for the ecm. i also had one on my 305, keeped saying fuel filters are pluged, unplug the chip and gained 3.0 mph.