since u said u had a fed spec, u don't have a choice of getting it coated or not. you can only choose the coated one.
as for sound, from previous reviews i've heard that the downpipe has made the car have a growl to it. like an agressive type growl, even with the stock muffler. visit club 3g for more reviews on the sound since more owners there have it.
same thing with the power issue. headers and downpipes haven't really had a big power gain on our cars. but dollar for dollar wise im pretty sure that the downpipe would be cheaper since the downpipe is about half the cost of the headers and the gains on the headers aren't that much, especially since u got the fed spec car which are really similar to aftermarket type headers.
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