Ford Focus Forum, Ford Focus ST Forum - View Single Post - Those with Magnaflow's Exhaust System (Part #15072)
View Single Post
Old 09-03-2012, 10:38 AM   #35
dyn085
That Guy
 
dyn085's Avatar
 
Join Date: Apr 2012
Fan#: 98047
Location: Fayetteville, NC
What I Drive: 2014 FiST/FoST

Posts: 12,208
Points 23,962, Level 94
Points: 23,962, Level: 94 Points: 23,962, Level: 94 Points: 23,962, Level: 94
Level Up 62% Completed
Level up: 62% Level up: 62% Level up: 62%
Forum Activity 9%
Activity: 9% Activity: 9% Activity: 9%
FF Reputation: 49 dyn085 Great Standing Member
Buy-Sell-Trade Rating: (5)
I think I misread your post if you are talking about coupling the Magnaflow kit components with 2.5" piping. Those components may not work with that size piping, but I'm not 100%. Going with 2.5" and removing the cat, would require a full custom build, or long-tube headers and one of the available 2.5" setups.

The only real issue is the possibility of beginning to run a lean AFR, though there isn't a lot of data showing of just how lean the system will/can get. Focusboy is running the long-tube headers and his dyno did show a slightly lean condition, though still within tolerances. Obviously, waiting for a tune is always the best option.
__________________
FocusFest 2013: Best of Show
Gateway FFW: Show Class Outstanding
September '13 ROTM
2014 FiST-
dyn085 is online now  
    Reply With Quote