I went quite over the top with mine and also put massive barbs in so I designed an idle bypass pipe so I could bleed air previous throttle butterflys if I needed to. not a required stage but I need idle Command. – Throttle finding dowels: Identical to OEM manifolds https://4age20vturboengineforsale61482.estate-blog.com/30722276/about-4age-20v-blacktop-for-sale