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I have been lurking on this list for some time, really enjoying and learning from all of your experiences. I'm the guy who has Mistral's serial number 001, two rotor normally aspirated engine.
I just finished tacking this exhaust system together and thought that I'd ask for comments. The current material is mild steel, but my plan is to take it to Burns Stainless (just down the road from me) and have them duplicate it in 16 ga. 321 stainless. The collector is from Burns, as is the muffler. If you can see the tacks, you'll be able to see why I'm taking it elsewhere. ;-) The header pipes are 2" and the combined pipe after the collector is 2 1/2". This was recommended by Burns.
After fabrication, I plan to have it coated with HPC HyperCoat Extreme as my design goal was to get the heat out as quickly and directly as possible and keep as much in the pipes as possible until it exits to atmosphere.
The oddball bends in the header were designed to keep the header pipes the same length, which they are. Given all the difficulty some have had with their exhaust systems, I'd thought that I'd throw it out there for comments.
Best Regards,
Steve Thomas
SteveT.Net
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