Is there a specific reason why you dont want headers? If its the usual header BS, then how about Schumacher engine swap headers? Maybe not the best performing, but still WAY better than iron, and no install hassles, no leak hassles, no header sound and no clearance hassles. VERY nice quality looking pieces too. Unless its about visuals, like staying OEM, or maybe building a sleeper, the Schumachers cover a LOT ov bases.