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      12-05-2011, 12:29 PM   #84
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Drives: Slow
Join Date: Feb 2008
Location: Luton, Bedfordshire

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Originally Posted by swamp2 View Post

Do you mean the pneumatic valves also fail and are available are separate replacement parts?

You also mean the particular valve you have selected has been used in a 100% non-serviceable location, inside of an exhaust canister? If so, was this done in an aftermarket exhaust or by an OEM?

Did Evolve or your valve supplier already conduct a full year of thermal cycle testing?

Last but not least is your system more or less a straight pipe with the valves open?


Yes, OEM pneumatic valves also fail.

And yes, the same valves have been placed inside mufflers where they are not servicable by some very highly respected aftermarket companies who also produce for OEM.

The supplier has been offering these valves for many years.

Our system is not a straight pipe with the valves open. That's ear bleedingly loud.

If you look carefully at the design you can see that the quiet path with the valves open is still operational to some extent but then starts playing the role of a kind of Helmoltz chamber.

All sections have perforation on them in different sizes and shapes.