Hi, are first generation altimas 94 have the same ka24de engine as 240sx(90-94)? i plan to install a dc sports headers and they have it for ka24de engine. i appreciate your input.

NO! The headers are not the same. Get headers that list your year of Altima. Headers for later Altimas may have an interferance problem that causes them to hit the block on early Altimas. 240SX are rear wheel drive?