3000GT VR4 EGR Blockoff Plates
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Design Files for EGR blockoff plates for a 6G72-TT Fed Spec Car. 3D Print for Mockup ONLY
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These are EGR blockoff plate design files for a 3000GT VR4 with OEM plenum and exhaust manifolds. They are verified to work with a 1st gen Federal spec car, but unknown for a California spec (with EGR temp sensor) and later gen cars.
3d print them first to mock up and verify fitment, but do NOT use the 3d printed parts to try and block hot post-turbo exhaust gases… Get them laser cut from an on-demand laser cutter. I used Send Cut Send, then flattened them with a belt sander. If you are really serious, then take them to a machine shop and have them flatten the gasket surface with a surface grinder or a mill.
I designed these by taking measurements from OEM EGR gaskets and overlaying a canvas/photo of the EGR gasket. The outer curves are just circles that have a 5mm bigger radius than the holes, which was verified, then a tangent line ran to the circles to get the final profile. Bolt holes were set to 8.2mm, to fit the correct M8 bolt. The factory flange thickness is 7mm for the EGR to turbo, but I had them cut from 6.3MM 304 stainless sheet and 6061 aluminum (for the egr valve only).
304 Stainless should work for both, the aluminum is only for the intake plenum if you want the plates to match the aluminum finish (so 1X egr valve blockoff and 1x egr turbo blockoff in 6061). The blockoff plate which goes on the turbo hotside should 100% be steel, so either stainless or mild. For a minimal cost difference, 304 stainless won't rust.