I went pretty over the top with mine in addition to place large barbs in so I made an idle bypass pipe so I could bleed air past throttle butterflys if I necessary to. not a vital stage but I would like idle Command. Re: ITB Conversion on 16 valve https://4age-for-sale66047.affiliatblogger.com/83528989/details-fiction-and-toyota-4age-blacktop-engine-for-sale