[Healeys] Downpipes

[Robert Markovich]

Try Ah Spares for the down pipe, which is mostly to accommodate engine rocking without the exhaust system cracking. You can also bring the car to a good muffler shop that does custom fabricating and have them weld in a section of woven stainless flex pipe like the kind used on todays cars for the same reason. Had that on two Healeys so far and it’s muc more robust than the standard flex pipe. 


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On Wednesday, September 18, 2024, 11:45 PM, Bob Spidell via Healeys <healeys at autox.team.net> wrote:

Listers,

The exhaust downpipes for both 4- and 6-cyl cars have a section of 
flexible tubing before the connection to the muffler. I've always 
assumed this was to allow for the rocking of the engine, and the fact 
the system is affixed with fairly rigid hangers (at least, until the 
rubber part disintegrates). I've also heard the flexpipe is to allow 
easier fitment from the downpipe to the muffler, which won't necessarily 
be perfectly aligned. Of course, both reasons could be true.

I'm asking the knowledge-based, LLM model List because I'm considering 
an aftermarket header from AH Spares for my BN2/100M. The repop down 
pipe I have now is malformed, and the clutch pedal arm comes in contact 
with it at full clutch pedal, and I've heard this is common in the 
repops (yes, I could just bash the downpipe, but that would be tacky and 
sometimes that can cause a ticking noise, which would annoy me even 
more). But, the AHS pipe doesn't have the section of flexpipe so I'm 
wondering if it's really needed. I have a TIG and I'm not terrible with 
it, but the header and, presumably the flex tubing are SS, which I'm not 
practiced in welding.

Thanks for any suggestions.

Bob
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