The two inner (smaller diameter) pipes are from blow-off valves, am I getting that right?
Engine and exhaust setup looks great!
Rocky, that’s exactly what those are. AKA turbo bypass valves, that open when the throttles are closed, to bleed off excess pressure.
Exactly, the piping looks like this:
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@davidnunn posted:Why did you replace the Graziano with the Ricardo? The Ricardo’s seem to have maintenance and part’s availability issues. For that matter, why not just keep the ZF?
Just curious!Also, I like your rear lower control arms and the way they attach to the uprights. Solves all the lower shaft issues.
David, the short answer is ”Ideas change over time” 
Seeing that this would be far from an original build, the ZF was put aside for someone else, or a later original build.
The Graziano came from a wrecked R8, and the condition was a bit unknown. It now sits already in a GT40 kit car next to mine. And the Ricardo happened to be sold brand new at a great price. It also fits directly to the Ford Mod engine, and we havent had a hard time finding parts.