Ecotec Thermostat Housing Delete Water Neck Pipe Bypass 1/2" NPT M12x1.5 Ports

Description

I designed this thermostat housing delete / water outlet plate to solve the clearance problems with aftermarket bellhousing adapter plates and exhaust headers on RWD swapped Ecotec engines. I
got a lot of positive feedback on the design, so I had a batch of parts cut on a CNC mill from 6061 billet aluminum. I have already sold most of them directly to enthusiasts, and I'm liquidating the remaining stock here, at cost.
Features:
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Completely eliminates the factory thermostat housing and water pipe, which solves clearance problems with transmission adapter plates and opens up more space for aftermarket exhaust headers.
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No more long lower radiator hose running the length of the engine bay, or looping around between the engine and the firewall to reach the back of the head.
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Maintains the bypass cooling loop by allowing hot coolant to flow out the back of the head, unlike other aftermarket thermostat delete solutions which block that port off.
Requirements:
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Regardless of whether you are using the factory water pump or an electric water pump, you will need to fabricate a coolant inlet for the engine. The most common way to do this is to weld an aluminum elbow onto your water pump cover for the lower radiator hose to attach to.
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If you are plumbing the bypass loop (and you should) you also need to add a port for the bypass coolant to return to, probably either at the water pump inlet or on your radiator.
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If you wish to run a thermostat (and you should), you need to mount it somewhere. People who have done this already found that it works best in an inline housing in the upper radiator hose, with a small (<=1/8") bleed hole.
I can't guarantee fitment with any particular setup, but I have tested it with a factory cast iron LEA exhaust manifold and a tubular aftermarket turbo header (pictured) and there's lots of clearance. Everyone who has bought one so far seems to be happy with it, and nobody has reported any problems.
The ports are 1/2" NPT and M12x1.5. You can use the NPT port to plumb a heater core, or as a turbo coolant feed, or just return coolant straight to the water pump inlet, or just plug it if you really want to. The M12x1.5 port is designed to fit a factory temp sensor as pictured, but again, you could also use it for any number of other things.
You will receive:
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1 plate
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1 gasket (same as GM thermostat housing gasket)
The brass barb and sensor in the pictures are for demonstration only; they are not included. The bolts are not included; the upper two are the same as the factory thermostat housing, so you can reuse yours, and you will need a third bolt the same size, M6x1.0x25. These are used all over the place on modern GMs, so if you're doing an engine swap, you probably have plenty of them already.
I am not a business, and I am not selling these for profit! The price is just what the parts, shipping, and fees cost, rounded up to an even number. I designed this part because I thought it would be cool, and it's something I wanted for my own Ecotec swap, so I had enough of them produced to make the cost per part reasonable. I don't have any plans to produce more of them, so once these are gone, that's all there will be.