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Tensioner Good, Exhaust Bad

This may have already been answered, BUT:
   

  I kept going through downpipes on the GTI...  Don and I fashoined up a nice 
flex joint with a larger ID.  I don't know the size, but I think it is 
overkill...  I got it from a Mazda (GASP!).  Most of the Jap crap has a good 
flex joint, it looks like a giant stainless steel hose cover, but has an 
internal flex joint of some unknown nature...  It works a treat, I have been 
driving hard for 2 plus years on it...  Also something else that will help...  
The early cars (Rabbits for sure) had a bracket that extended from the rear of 
the tranny, and from the engine block.  These two brackets would mount near 
the beginning of the 90 degree bend there at the firewall.  This helps stop 
the downpipe from causing stress at the exhaust manifold from engine movement.

HTH

David Utley

Quoting Spewey <spewey@comcast.net>:

> Bryan Rankin wrote:
> 
> > Brought it home, and the old man was positive it needed a flex pipe. 
> > What do you guys reccomend I do?
> 
> This is tangentially related to the 16V downpipe issue.  That system
> flexes on springs on the dp and a ball joint exh connection right in
> front of the cat.  The lowly toilet bowl 8Vs flex at the toilet clamp
> joint.  MkI &etc. have that lovely corrugated foot-long flex tube that
> doesn't come stock bigger than 1.5" or whatever and FLAPS knock-offs are
> definitely inferior metal and not a good solution anyway.  I would love
> to hear the current state of the art on solving this matter from the pros.
> 
> If the exhaust is attached to the engine rigidly, it is essentially a
> big lever and Archimedes taught us that those are powerful.  Somewhere
> it will eventually break so the old man is right again--you need a flex
> point.
> 
> 
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David Utley
-----------
Cable Volkswagen
405-470-3129
1-800-522-6793