shawfm

So as I proceed to return my car to stock, I pulled the ATP manifold...
I found a nice hairline crack starting to form on it.
I had the manifold treated with Jet-Hot and some machine work done to it before I had installed it 2 years ago.
Called ATP "Our manifolds are warrantied for 1 year."
However the machine work allowed me to pull the manifold easily and left the exhaust studs straight.

A400

You aren't the first to have this problem. If you want to obtain a very nice cast manim I would recommend the Dahlback peice if you can still find one. Fahlback told me it was modeled after the Sport Quattro mani and is a pulsed manifold to speed spool up. It is very well built and requires no work of any kind, but I did Swaincaot it to also speed spool up. Tim at NEA may still have one as hr moved to an equal length steel header.
Rod

shawfm

I do like Dahlback piece, but I won't be modding this car anymore. Back to stock, sell, buy a B7 and start all over.
I know ATP had cracking problems, they started showing up after I had already bought this manifold, that is why I then added the Jet-Hot.
More annoyed with their warranty support. Sorry 1 year.