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if you already have OFT then catless headers plus E85 fuel, the open flash header will be hard to beat on bang for buck as you get discount on it as you have purchased oft.
leave intake alone , put in a good quality drop in filter if you like, rest of exhaust produces little gain once you change headers, just do other exhaust mods if you want sound change, catless headers alone will make it louder. this is for NA car.
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