Ok i wanna run straight pipe from under my car. question is will the bottom of the car light on fire if i have the exaust exiting parellel with the bottom of the car about half way, or should i get a 45 deg or 90 deg bend down to have it shoot toward the ground, like when it back fires or if hit redline or on shifts, should i be concerned?

 

I have my exhaust dump blwoing straight into the side of my tunnel, it seems to be fine, sometime the floor gets warm, but if possible def run a turndown or whatever they are called