ya got me on codes. i ran a viper box on my 2002 srx on grass and it disabled the dcs. so sure different maping. they work, i dynoed three of them at jims. only race boxes out there and this is info i got from jim. their were high rpm boxes for 98-99 srx. very rare. 98 600 srx box on a 700 (race only) the race box for a 2000 srx '' stock '', and after that 8ek viper boxes. no timing curve. 3:16 (yammie tony)