1625 Series Modeling Block/Starter Tube Adapter

Cleverly designed anchoring block adapters that fit through the female connector of the icengineworks^TM modeling blocks, allow them to easily and firmly anchor to your engine's existing round metal starter tubes to begin the layout of a primary runner. Engineered to hide from sight, these adapters make it possible to lay out faithful 3D header models of your design without external support. And because the icengineworks^TM modeling blocks represent actual metal tubing sections, they are also fully compatible with your existing metal header components such as collectors, transitions, etc. when they are firmly propped.