you have an 04 so there is no de- snork needed. a high flow air filter is about all you need there. there is a lot to be gained with the delete pipes. first is a good bump in power , you will loose a good 30 pounds of weight and with the cats gone it makes working under the car much easier because of all the extra room and easy removal . don't forget you also get a more porsche like exhaust sound since you already have the factory sport muffler.
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Originally Posted by Timco
Yes, this exactly. I'm not looking to swap out every possible part, but am particular about keeping this car running right. The U/D pulley sounds like a worthy fix, but I'm not sold on desnork and delete cat pipes. I don't think all that time & effort is worth 10 HP at most....
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