i replaced the egr valve on my 2006 chrysler 300 limited 3.5.the first time i changed it i had a vacuum leak at the dust seal where it went into the upper intake.i took it all apart again and put new gaskets and a dust seal and o ring.now i don't have any leaks or lights on,but now my gas mileage is down from 19.2 when i had the leak to 15.8 with no leak.i'm stumped!!any suggestions?thanks alot for your time.jason

 

You are right that Mopar had been offered Authentic Jeep Accessories. I have noticed that The old accessories had been so stable and also capable to control overloaded over the it. It was great that It had been offered to replaced it but I think that Old is gold.