Hi guys i recently had an engine fire on my 1987 Toyota Supra .The engine fire was caused by a negligent mechanic and I am current in the process of sueing them . Anyways I lost my whole factory harness and researched that itd be more cost effective to put in a whole new stand alone system. I put in the SIMPLE DIGITAL SYSTEMS EM-4. I get my car back and there is a HUGE exhaust leak coming from the back of the head. My car sounds and performs HORRIBLE. Now I have plans to simply block off the Exhaust gas Regulation valves. How hard of a job is this ? I could care less about removing it I just want to stop the exhaust leak as easy as possible.I just spendt 6 grand on the ems, suspension, and various other things damaged by the fire. I really do not want to spend anymore money on this car right now. I would like to also mention I now have my DNA boost controller completely closed.