Don't feel like searching for 2 hours through dozens of threads with pointless posts, so here goes.

Does anyone know what the best lower/upper plenum combo is for a non-revup (03) motor? I haven't kept up with the NA developments lately and don't really know...

 

Crawford has one of the better options http://www.crawfordzcar.com

 

Guess I should have been more clear. I know everything about all the different upper plenums. It is the lower plenums that confuse me. And I don't know if certain combos work well/poorly, also.

 

https://my350z.com/forum/showthread....29#post4213829

Check out posts #4 and #6 by Hydrazine. I hope this answers your question.