WTB: 86-87 3sge Stock Exhaust Manifold w/EGR & o2 MODS CLOSE! COMPLETE! Hey all. I'm in search of a stock exhaust manifold for my 87 3sge gts. Lol. It's the one with the EGR and the o2 sensor in the manifold. I'm located in Hanford, CA and is willing to pay shipping. Please let me know if you have one because I need one to pass State Inspection. Thank you.