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No the 18 manifold has been on there. I can understand lower boost but my friend has the EXACT same setup on a 3.67 pulley and is making 12 no problem.

But to answer this those ports just go through the manifold. They do not have to be capped off.

This is the highest I have seen the gauge read to :/

Hi guys, 2017 Gt here with a 18 manifold IRMC locked out. I have bought a used Paxton kit that needed a rebuild of the head unit. I shipped it to Vortech and it is pretty much all new now except for my volute which was reused. While waiting for my rebuild I threw in my OPG and CS for some...

I know this is a old thread but have you figured out this problem? I have a paxton on the 18 mani with a 3.33 pulley and I cant get my boost gauge to read over 8psi! I just pressure tested my system to 25 psi and I have no leaks. I am tied into the brake booster line before the check valve, my...