theres people on here claiming similar bhp with similar mods
think the ads a bit vague and he could have expanded on it as we dont know turbo size,cam make,chip make etc

say he put

nms chip
newman cam
stg 3 hybrid turbo
grs cooler
running 22psi and making 250bhp + then i doubt it would get shot down as much

also ive seen less specced cars with graphs for similar bhp,shame that most people are clueless and will beleive everything they get told