Lol sorry. Under the car just behind my cat maybe 4" I have a 5/8" steel tube that goes into the exhaust pipe at a 15 degree angle with the direction of exhaust flow the end of the tube inside the exhaust is slash cut with the open towards the back of the car and perpendicular to the exhaust flow this is what creates the venturi effect. I'll try and find a picture of what I mean. You might have to copy and paste ye image link? I can't get it to show up on my phone. 
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