Was thinking about getting a Motordyne Plenum Spacer but dont know what size is good. I have a 05 G35 Coupe NA no mods done yet to it. I was wondering which is better 5/16 or 1/2 and what is the differences? Also can they be combined with a MREV 2 or know and any differences in HP? Thanks!

 

1hp difference

 

im sure there are several threads on this already, but in a nutshell 5/16 is for more midrange (and will clear a strut tower brace) and the 1/2 for top end. the mrev may be irrelevant depending on your model. http://www.motordyneengineering.com/ does a good job of explaining the rest

 

call and ask tony...