These ART pipes are ceramic coated for an extra layer of oxidation resistance for the stainless steel tubes.
Stainless steel can always be polished to a "T" at the time of manufacturing but once its put on the car and driven it will tarnish and turn brown.
The ceramic coating however cannot be made to oxidize because it is already in a highly oxidized state. The ceramic coating will provide extra salt resistance, reduce heat under the floor board and it keeps a much cleaner appearance over time.
The difference on the dyno will be slightly better than the prior design but not by much. It does however have a noticeably quieter and deeper tone.
We can certainly arrange for a series of independent comparative dynos tests and sound clips.
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