On Aug 15, 2006, at 7:51 PM, Charlie England wrote:

> Bulent Aliev wrote:
>
>> After almost 3 weeks, my new 2 pipe straight out exhaust is  >> finished.  It is made of 2"  321 stainless tubing. At the end they  >> converge into  one short 4" oval tube. The fancy bends are to make  >> the inside length  the same for each tube. The flange is Racing  >> Beat mild steel. Each  tube has one EGT sensor about 3" away from  >> the exhaust port. The O2  sensor is on only one of the tubes due  >> to lack of room.. My biggest  concern was the noise that it was  >> going to make. I was pleasantly  surprised when I started it in  >> the hangar (John Slade told me it is  OK to do it :). The noise  >> was almost the same as with the turbo  housing on. Saved 30 pounds  >> of weight on the engine and maybe 10  pounds less of ballast on  >> the nose. Did not have time to run the  engine at full tilt, since  >> I'm in the process of making stainless  steel heat shields.
>> Bulent "Buly" Aliev
>> FXE Ft lauderdale, FL
>> http://tinyurl.com/s5xw8
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> It sure looks nice, but is there any reason for the oval collector?  > Haven't quite a few others had fatigue failure 'issues' with non- > round outlets?
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>

That crossed my mind too Charlie, but we'll see? The shop that made  it it is across the street :)
Buly