This is a replacement spacer plate for your DIY turbo kit build. This is needed for LSJ/LE5/L61 using our T3 turbo manifold or a K04 turbo manifold as it blocks the PCV passage that the LNF has. 

We recommend the following gasket/sealing breakdown: Head > ZZP exhaust manifold gasket > Spacer Plate > RTV > Turbo Manifold. 

If you are purchasing our LSJ Complete Turbo Swap Kit, LSJ Entry Level Turbo Kit, or our 2.2/2.4 Turbo Kit you DO NOT need to purchase one of these as your kit includes one.