STM V-Band Manifold Collector.
When making a custom manifold, the collector is one of the most tedious parts. Since we are fabricating these in mass quantities anyhow, STM can save you the headache and you can pick up this starter piece. The collector is not fully welded, just tacked. The fun part is left for you.
V-Band Flanges and Clamps can be found here: TURBO HEAD & MANIFOLD FLANGES