3.5 maximas can be decently quick, my friends 02 6 speed (before he wrecked it) was a high 13 second maxipad. He had headers, intake, some type of apexi tuning thing (not sure what he meant), catless exhaust, and dyno tune. Thats pretty decent for a maxipad, that car ate 350z's, and it sounded absolutely orgasmic...