It's so strong but I don't see any fuel on the ground the check engine light is never on so I don't have a clue. I had my headers and entire exhaust re-done by Meinicke so it shouldn't be an exhaust leek..
what should I be looking for?
it smells really bad if I fill up the gas tank. could this be the fuel pump gasket?

 

Check the fuel tank vent lines and emissions / evap components.

 

Thank you I will check.