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Date: Tue, 27 May 2014 07:52:06 -0400
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From: Tom Thibault <tom@lachollatech.com>
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Subject: RE: Exhaust Update
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I concur 100% with Angier about Custom Aircraft Parts.  BTW, they are in 
El Cajon, CA (near San Diego).

They custom built my cross-over four into two into one system for LNC2 
from a PVC mockup that I shipped to them from Tucson.  It has worked 
perfectly since 2005 and has never cracked or leaked.  This design 
requires no hangar near the exit.  The only support is the four flanges 
on the engine.  The #1 and #2 tubes join via slip joint under the sump 
(so do the #3 and #4). The cross over is under the sump due to forward 
facing fuel servo. These pairs are then in parallel facing aft on the 
pilot's side.  There is one more slip joint for the larger exhaust tip 
to join the pair of tubes.  The exhaust tip (slip joint) is held on by 
four springs.  The only maintenance is to replace the springs every 
three or four years.

Tom Thibault

Angier wrote:

As a field repair, the weld repair to my damaged system was good (enough 
to get me home) but not quite good enough to be a permanent repair.