Pictured are the head aspect of The 2 manifolds, the bottom manifold getting the Blacktop, discover the way it has four more bleed points with the air into a typical chamber. This will make certain the throttle plate is completely closed, but stops it from impacting about the throttle bore https://4age20vblacktopforsale36926.shotblogs.com/the-best-side-of-4a-ge-engine-for-sale-48550203