Pic Help: What's between this x pipe and headers?

[dave73chally]

Good info thanks guys. Looks like the picture above is using them to easily adapt a pre made x pipe without going too in depth with custom tubing. Found the picture in summit racing reviews, I'm debating doing the same.

[burdar]

Have to consider the loading in each application and they are not created equally.. From my experience, V-engines in a RWD appication generally do not have them. Inline 4s have them to account for fore-aft movement of the engine in the car. In the configuration shown, the loading through the flexible joint will be torsional, not the same loading.

If the joints are intended for torsional loading, they should last well. If they are not, then they will not last well.

   Like I said, you'll most likely see them on engines that are mounted transversely due to the direction they move under load.