So I finally bought a motordyne 5/16 plenum spacer (the basic model) for my z and have been extremely excited for it. However for some reason I followed the fitment instructions on amazon (I guess I was too excited) and saw it fit on 05 z's and other non high rev z's. So I ordered it. Then I quickly realized the track edition, which I have, is a rev up engine. Long story short, I'm buying the mrev2 right now. My question was should I get the isothermal spacer instead? Ive been searching this topic for a few hours trying to justify the cost of the mrev2 and the only combos I have really seen are the mrev2 and the isothermal spacer. Would using the basic spacer make a difference? Also is there such thing as an isothermal mrev2? I didn't think there was, but this site says differently (http://www.thezstore.com/store/merchant.mvc?). Thanks for any help, I'm pretty stressed over this right now, sorry if I over looked anything.

 

You can just buy the iso-T stuff sperate. http://www.motordyneengineering.com/index.php?cPath=2_8 ~ for $51. Iso package just makes everything a bit cooler. Everything works together, Iso stuff, spacer, and mrev2 . You will get very easy instructions to follow also.