Yes, the rear o2 housing.
The front is not without work as well. The GCTech mani's bring the turbo about 1/4" closer to the head than stock. This created an issue when using the lower turbo/o2 support!
So I resolved this by elongating the support holes.
So I thought! The O2 housing actually hits the rounded inside edge of the brace.
So back of to the vise, and grinder I went... Success!
So I thought. I had to take a hammer to the oil return lines heat shield as it hit the corner of the Engine mount.
That ended up not being quite enough so I split the turbo, covered everything, and busted out the grinder. This also made it easier to mount the return to the turbo while off.
Buttoned everything up, and installed the oil feeds, and water feed/returns. I need to pickup some hose, and make the lines more presentable to finish though.
I also had the splitter in the IC Y pipe extended to try and eliminate the surge issue. Will see...
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