ok boys i need your help!!
what is the difference between these?? please click on the link ive provided.

http://motordyneengineering.com/G35.php

i would like to get a thermal spacer but which one?? a copper one? and also, anything else you suggest?? or is needed?? and has anyone used this company before??

thanks a bunch!! and i appreciate your help greatly!!!!!!

 

well the description says it all

the copper upgrade is if you live in harsh weather, such as if it gets really hot or really cold or if ever snows in your area, the copper upgrade prevents performance loss

it all depends on where u live, but would chose between the thermal or the copper thermal

 

are you set on motordyne?

i have the powerlab spacer. built in gasket. works great. quality stuff

https://g35driver.com/forums/engine/...er-vq35de.html