I currently have a stock 04' Z, that i'm going to upgrade during this winter.

I already "invested" in these parts: (not fitted yet)

-Vortech V-3 SCi supercharger system
-Tomei expreme exhaust manifold V.2
-Tomei straight front pipes
-Stillen Y-pipe
-Fujitsubo Legalis R exhaust system

But, I'm thinking I might need an intake upgrade to match my other upgrades.
I am thinking that's my next step. I might be wrong, so I'd like some advice.

I've been looking at plemum spacers, and intake manifolds (kinetix and others),

So, I am wondering, should I consider any intake upgrades to go with my other modifications?

If so, what hp-increase could I expect with intake upgrades?

Thank you in advance for all replies!

 

You can put a plenum spacer on but don't expect a huge gain, your bigger gains will be made via the supercharger.

Check out Motordyne - it's my opinion that they make better parts, have a better reputation and have great customer service. But I've never bought anything from Kinetix - but give motordyne a fair shake.

I would add an oil cooler if you don't already have one -

 

Kinetix gets a bad rap in the Z community. I've ran their first gen super inexpensive suspension parts for 5 years now putting them through hell, and they haven't broke. Also apparently the velocity manifold is good for FI and built NA cars w/ cams so I hear.