Now I already know I am going to have someone say why mod a 3.5l but as is right fresh oil and sensors functioning properly I get close to 50 mpg on hwy. Now with that said I am currently working on my exhaust. I have had the resonator deleted and now I'm looking at a new muffler. I have heard flowmaster 40 series and think they sound amazing as does the magnaflow. I was leaning towards flowmaster but my exhaust guy said the magnaflow muffler is way better for the 3.5. Which would you all suggest I am wanting sound you know that one that turns heads but I also want performance. If I can get it to pull the performance to a solid power and fuel efficiency level with sound that would be ideal. I know function takes away the sound and sound can effect the performance. Please let me know if any others have done the delete and new muffler and what you think is best. Thank you in advance.