Noticeable gain from sealing off?

[SlamminBeats]

probably. 35s can take 2k daily.

[audiofanaticz]

[Mobileaudio25]

That setup looks bad ass. I ended up sealing it off and did a 145.0 MECA style at idle. I installed a tach and am getting a bigger alt. should be able to pull a 146.5 or so...