I am going to build a new DP as the ATP is superb but I cannot fit the giant cat into the middle of it as planned.
I ended up with enough parts that I am probably going to build one more exhaust and sell it as well as the new ATP DP.
Man, Ford really shoved that OEM cat as close to the turbine as they could. Probably lights off pretty quick though.DP is nearly done, spending many hours getting it aligned just how I want it for the following exhaust to aim so I can eliminate as many bends and lessen the ones it has to have.
Porting every step of the way to ensure the cleanest flow possible, every bend a true bend and not cheated, flared out the bend out of the cat as the hole was bigger than the pipe, it would of been weldable but left a major step causing a loss of efficiency, turbulence, etc. I spend an hour with a tiny ball peen hammer and anvil to get it just right and then after welding in place another 45 minutes or more smoothing out the transition with a die grinder.
Top is mine, middle is ATP which is a great DP and bottom the pathetic stock one.
View attachment 2195
Outlet on mine is a bit bigger than the others, one more thing to help flow better, how much it helps, or could even hurt in some ways, I will let the engineers ponder that issue
View attachment 2196
Other side to see the sensor bung below the cat.
View attachment 2197