Is a 3inch cat back worth it for a 97 f150 with a 4.6l or is it to much of a back pressure loss? would i loose low end torque?

 

I don't remember where it's at on here but someone had a good write up on how the stock 2.5" is more than even the 5.4L needs. if you wanna go 3" after the muffler I'd say go for it, but you might lose some low end if you go 3" cat back