catted headers

So, as the title state, had a tune done. Tuner says O2 will be ready eventually. Tried to follow the drive cycle in the owners manual, and a different one I found on here. Few things about the car. 17 Gt 6spd with 18 mani, locked imrc, 47lb injectors, Kooks catted long tube headers, O2 defoulers...

Hey, ALL! On Today's Schedule for Lethal Performance's 12 Days of Christmas Sales, we have... Over $100 off Longtubes for 2015-up Mustang (Off-Road & Catted) !! If you've been looking for some amazing Headers at a STEAL of a price, fitment is on point; these are it! Features: 1-7/8" 304...

Hey, ALL! On Today's Schedule for Lethal Performance's 12 Days of Christmas Sales, we have... Over $100 off Longtubes for 2015-up Mustang (Off-Road & Catted) !! If you've been looking for some amazing Headers at a STEAL of a price, fitment is on point; these are it! Features: 1-7/8" 304...

Hey, ALL! On Today's Schedule for Lethal Performance's 12 Days of Christmas Sales, we have... Over $100 off Longtubes for 2015-up Mustang (Off-Road & Catted) !! If you've been looking for some amazing Headers at a STEAL of a price, fitment is on point; these are it! Features: 1-7/8" 304...

Hey all, I just wanted some opinions on a little custom exhaust idea that I have and I wanted to see if anyone has tried a similar thing. So I want to get some long tubes, probably 2m because they're pretty affordable and I've seen a lot of good reviews, but I also need to stay emissions...