Agreed! Start with the spacer... I immediately noticed the difference prior to my tune then afterwards it went to another level
If you're looking to install the Mrev2, I'd look at the used classifieds for them...G35 forums will have them for sale from time to time. I found an Mrev2 for cheap and installed it myself. For me, I noticed the difference in the upper rpms.[/quote]
Yea. I spoke to someone at Motordyne n he said the same thing. He said that the motor that I have is not the "rev up" so I don't need the mrev. He said the spacer would be more than enough. Because I live in NYC, he suggested I get the Copper Isothermal 5/16".