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There is a coating place down in Auburn that I can't recall the name of Corvettes of Auburn might could help you out there. If you haven't bought them yet then order them already done. You are going to want a tune after install so be sure you find a place that can do both. Since your in Bothell I recommend Ellis at Speed Secrets in Monroe. He did the tune on mine after I installed my own. Took about 30min and then we took it for a good shake down drive to verify everything. I personally prefer a road tune versus a peak HP dyno tune since I track my car regularly. You can usually find him over in the LS1Tech NW section.
Try this guy out, he installed my headers for me, very good price, he works on hotrods out of his garage.
Jack 1-866-410-5225 Shop line or 206-660-6256 Cell MON-FRI 7:30am to 5:00pm