The lunch they brought over was every bit as good as its reputation.
Literal
Carried-came-[benefactive-てくれた] lunch [topic-は] rumor [to-に] not-differing delicious was.
噂に違わず ('true to the rumors, not differing from reputation') is an idiom: 違う 'to differ' + ず (classical negative) = 'without differing.' 運んできてくれた stacks three auxiliaries: movement toward speaker (~てくる) + benefactive (~てくれる) — someone brought it over as a favor. 旨い (うまい) is the casual, masculine form of おいしい.