phil_635
Member
- Joined
- April 12, 2006
- Messages
- 12
- Reaction score
- 0
- City, State
- MT. Pearl
- Year, Model & Trim Level
- 2003 XLT Explorer
I have a 2003 4.0L ex. The ex has 3 cat's 2 are right under the flanges on the front pipes then the pipes join into one then runs into the the 3rd cat. i took the 3rd cat off alltogether and replace the stock muffler with the flowmaster 40. What i want to do now is replace the 2 front cats with high flow cats, then instead of the two pipes joining into one i want to put either a h pipe or and x pipe in and the run two pipes back into 2 flowmaster 40 then out to 2 tips.
Will replacing the stock cats with high flow cats make the engine light come on and run rough? also will i loose back pressure and torque form the duals? and will my MPG change (better/worse)?
Will replacing the stock cats with high flow cats make the engine light come on and run rough? also will i loose back pressure and torque form the duals? and will my MPG change (better/worse)?
