If they don't look, run a set of catted long tubes with a good tune. As long as they are catted, there is no reason to turn off the rear o2 sensors, like most tuners do. Unless CT has something crazy going on that I don't know about, there should be no issues.:cheers:
That's not going to work. Aftermarket cats have lower cell counts and will trigger a CEL.
Not sure about that. My 13 has Kooks catted long tubes and I pass emissions testing every year here in Texas with a VMP tune. All monitors set to ready and zero issues.
This will not work. First the aftermarket cats are usually high flow with a lower cell count. 2nd, the placement of the aftermarket cats in the exhaust stream makes it difficult to reach the correct temperature to pass inspection. This is the reason the stock cats are placed so close to the engine.
If you mean the o2 spacers possibly. But often times they won't throw a CEL but also won't allow the readiness test to complete.
how much did you have to lower engine to get those kooks headers to fit and is the cat to header mount location in the same spot
would mak cat delete pipes fit or would i have to do a custom setup and would the stock cat midpipe bolt back up when inspection time comes if i weld on a flange.
This is untrue. The factory-stock Coyote "shortie" headers prior to the cats are quite good. Think about it..., FORD spends tens-of-millions of dollars on R&D developing their powerplant combos; do you really think they are going to pour millions of dollars into developing cylinder heads, cams, VVCT systems, et cetera and leave HP on the table by designing a restrictive "shortie" header? No.
