valy Posted December 16, 2016 Share Posted December 16, 2016 (edited) guys,I have got a similar APS Tallboy plenum and I need to know as pointed below with the black arrow where does this connection go and what is the purpose ,as at the moment I have a closed cap there.thank you in advance Edited December 16, 2016 by valy Quote Link to comment Share on other sites More sharing options...
andybp Posted December 16, 2016 Share Posted December 16, 2016 since thats a supercharged engine may be pressure/vaccume reference for fuel pressure regulator just guessing Quote Link to comment Share on other sites More sharing options...
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