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From: Alamosa, Colorado (200 yards from the Rio Grande)
RE: srt-4 stage 1
It will run just fine by itself. It's a bit more fun to add a Mopar BOV and a Mopar/Borla exhaust, since the Stage 1 is tuned to get the maximum out of these upgrades/mods.........If you have a 2003 SRT-4, you'll get bigger injectors as well, which are stock on later models....