Hay guys i really want to get the motordyne 5/16 Plenum space but before i do i wanted to know if i would have any problem with the dealer warranty wise.
Does anyone know if the spacer causes any problems? or if the dealer seas it will they void my worrenty.

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keep the engine cover on, dealer will never know. also it depends on what you're taking ur car in for.. like if u have a misfiring problem or vibrations i would take it off

has anyone had problems with the plenum spacer setup?

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No problems here nor do I anticipate any, as well.

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I have the spacer and the dealer has never mentioned it. Take a look at this
link if you want additional information on what mod'ing does to warranties. Basically, the "Magnuson-Moss Warranty Act" states that the mod has to be proven to cause the particular failure. Go for it!
Magnuson-Moss Warranty Act

No problem with the spacer (especially since you're looking at 5/16). The install was fairly easy. Just make sure you have good lighting and a torque wrench.

No Torque wrench used = snapped bolts and studs. Use a torque wrench, you will be ok. I have the spacer installed, took my car in for service last week and ended up talking about some performance things to the guy who worked on my car, and he said, "You know, I hear they make a spacer for the plenum, thats something you can install, and the dealer would never know it was there unless they had to remove the cover." So, there ya go!!

My dealer hasn't noticed it. Only mentioned about my grounding wires which they thought was a good idea.
I don't expect it to be any kind of problem unless it truly was the cause of some warranty problem.