Hey guys I just got my 07 yesterday. Fun as hell to drive but this morning I took off the muffler to see what it sounded like until I get flowmaster next week.Would taking off the muffler affect my mpg? Negatively or Positively?

 

negatively

 

dang, how about with my flowmaster? an increase in mpg?

 

umm possibly....not really sure...if anything like 1mpg maybe 2 on a good day

 

No change in gas mileage for me.

Had mine off for 9 months and had the car for about a year.

I commute 70 miles Mon-Fri (all freeway traffic) and a few miles extra city. I get an average 23 mpg (freeway &city) and about368 miles on a full tank. My full tank last 4 sometimes 5 full days. Sounds like good gas mileage to me

 

1 more question, does the carbon monoxide leak into the cabin with the muffler off because the mid pipe ends right after the rear axle?? i just dont want to be dying slowly, ya know?

 

Sent you a PM response. But no, not where I cut it off...right at the muffler. If you cut at the cat, then you will have that problem. I didn't leave the pipe like that though. Welded a pipe extension and added a 3 inch tip.

 

So it would be safe to take off the muffler ( axle back)? Thanks for your help!

 

i was thinking about doing this untill i got my flowmaster, how does it sound?

 

it sounds like a gt at idle but high rpms sounds like a cross between a ferrari and and a motorcycle. Revving in neural or park is fun, peple have mistaken me for a gt.