Re: Couple of things !
Restrictor goes between the turbo nipple and the T-piece if you are still running a 2-port.
But I expect yours may of been converted to a 3-port boost solenoid and hence the plumbing is different and doesn't require the restrictor.
Standard 2-port plumbing :
turbo to T-piece (restrctor in pipe)
T-piece to Actuator
Bottom branch or T-piece to Boost Control Solenoid
Then Boost conrol solenoid to inlet manifold (the little black elbow just to left of main induction hose).
3-port plumbing :
turbo to Boost control solenoid (top port if OE 93-96 style solenoid)
Middle Boost Control Solenoid to Actuator
Bottom Boost Control Solenoid to inlet manifold (the little black elbow just to left of main induction hose).
re : headers, ported OE should work. It may improve midrange torque but loose a little top end.
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