11 pics, you guys really like your manifold.

 

Lol! Cleaned it up a little bit. We'll keep it oriented on the manifolds

But yes, we're extremely proud of our manifolds along with our turbo system.

-O'Brien

 

About the machined area of the head flange, is that to add pressure to the gasket?

 

The cutback on the flange around the ports helps promote better gasket sealing by applying the pressure mainly on the ports and not the entire surface area of the flange.

MrC

 

A lot of nice manifolds yo!

 

Yeah, just read this thread from the start, we have tons of options now!

 

So can someone enlighten me as to which manifolds are prone to cracking?

I know the Mase one is very prone to it and most of the bottom mount ones (Full Race Ramhorn, Ptuning, etc.) aren't, but I thought I read someone (who seemed fairly knowledgable) say that pretty much all sidewinder styles would crack eventually because of the weight and vibrations... is that true? Any sidewinders that have absolutely no cracking issues?

Set me straight if I've said anything wrong. I don't want to spread false information...

 

Most tubular manifolds will crack with time and vibrations but no big deal in my opinion, just repair and brace it.
The turbo is very heavy and the tubes get weaker with the heat, long tubes weaker than short ones.

A tubular welded manifold will never be the best when it comes these things but well worth it because of the performance.

 

very rarely will a full race manifold crack, robotic tig welded, and have a life time warranty against cracking to the original owner

 

yea full race i think has the best warranty on the manifolds around...