Slowxr6t Member 589 Member For: 6y 7m 9d Location: New zealand Posted 25/11/19 05:32 AM Share Posted 25/11/19 05:32 AM My fgx just pulled 414 at 18psi today. It does have a 3582 with .7 housing and standard airbox with k and n. I have 4 inch exhaust up to the 3 inch flange under the car and no cat, standard 2 mufflers. Link to comment https://www.fordxr6turbo.com/forum/topic/93233-factory-catback-restrictive/page/2/#findComment-1690171 Share on other sites More sharing options...
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