ok, i remember reading somewhere on here that everythingg35 had the plenum spacers on sale. well, i didnt realize that just the plain spacer was the one on sale, i thought the copper iso thermal was on sale. is the difference between these two really worth 100 bucks? im not considereing the mrev cause im auto. thanks

 

depends on the weather where u are from. I'm from CT and the winters are cold as ****. I believe the iso thermal is good for temps that drop below 30* but dont quote me on that. I have one and love it!

 

FiRe just curious, did you do the install yourself? i MIGHT be getting a spacer in the near future and well im only 17 so ive very scared opening up my engine like that haha

 

no the copper part is for cold weather. the iso thermal part has nothing to do with that...

 

^ yea but you were asking about the copper iso thermal one, i just forgot to add the word "copper" before iso thermal lol.

this explains each difference

http://www.motordyneengineering.com/G35.php

 

thanks for the link, the iso thermal is only good for one extra hp?

 

I also had the same question as I was looking into the 5/16". If it is driven in cold weather now though with no problem, why does it reccommend the copper, i was looking to get the iso-thermal one opposed to the copper isothermal.