well i spike 19 when im on "race mode". for me race mode means hooking up my MBC, daily driving i run no MBC just WGA. and as far as max boost, i havent put on a wideband yet so i really dont know. but i havent deteonated once yet even at such high boost levels. by the way stage 0 for 2004 is different from 2003. the injectors make a world of a difference.