Could someone tell me if the exhaust on a 2011 Shelby is 2.75" or 3"? Im wondering if/when i get headers will i need to change the entire system all the way back or will headers and an X or H pipe be enough. I know i should change it all but honestly i like the sound of the stock exhaust. Also i am sure it does but im going to ask anyway. Does the car need to be tuned when headers are added? Mainly because i am trying to avoid the warranty issues with a tune. If it does need a tune ill most likely do it anyway but if i dont have to i would like to keep that option open.

P.S. I need to keep the cats on for emissions, i hate nevada and its lousy DMV...

 

i have no answer for you....just a comment... HOT DAMN THAT CAR IS SEXY!!! that is all.....

 

LOL Thanks

 

I concur! BEE -UU-TEE--FUL

*Yours are 2.75"

Here's a reference article that says so: http://www.motorator.com/blog/ford/2...otos-and-specs

 

Thx Fifth,

I guess ill be replacing it all, now i gotta find out if that needs a tune.

 

If you want to get the most out of it, yes.