Quote Originally Posted by SPOOLIN View Post
my bullseye s372 states that a -4 is required, its the same thing as a borg warner turbo, just with their different turbine wheel. If you run the PROPER feed line size, then a journal bearing turbo should never need a restrictor unless your drain is shit. ...which shitty drains are pretty common.
Don't know what to tell ya, but -3 or a minor restrictor is what is recommended per Borg Warner. It is listed on in the Borg Warner catalog. You can see the catalog on the Full Race site.