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stainless steel will be the better of the two. sure it changes color due to the extreme heat of the eshaust gasses. but it will hold up better than a ceramic coated unit. ceramic coated units are typically a cheaper steal coated with the ceramic and have a tendency to rust and crack at the welds. i feel you will be happier with a stainless unit. unless money is a major issue.
as for brand. they are all about the same. DC is an exellent unit. there is a new one, not sure of the brand the name has slipped my mind. it has been in the last few issues of turbo magazine....or maybe its import tuner.....which ever one has "power pages" they tested it on a 5th gen civic hatch and made impressive numbers on a tired motor.
the next question is whether you want tri-y (4-2-1) or a 4-1 unit. they both make power differently. i forget which gives power in what range. someone who knows more will have to share that information
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