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I don't think it is approved. All the AI's have looked at it and said "nice exhaust". I think it's one of those, don't ask, don't tell items. I use Jet Hot exclusively. Their 2000 black coating is done in only one place in the states, Pessagula, MS. Not cheap, but I feel it is worth it. A lot of complaints I hear about ceramic coating it due to the fact they use a lower quality coatings. Most standard coatings are good to 1600 degrees intermittent. This coating can withstand 2000 degrees continuous or 2400 degrees intermittent.
They do alot of aircraft exhaust and advise... If it is a turbo model only do outside only. They've never had it come off, but...... on the non turbo model I've done inside and out. Makes those mufflers last forever. I also do the turbine housing on the turbo. Keeps heat soaking on nearby parts down.
Last edited by Richard : 04-06-04 at 11:02 AM.
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