Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - 2012...Magnaflow good choice?
View Single Post
Old 01-11-2013, 12:03 PM   #4
Focus Fanatic
Slo86GT's Avatar
Join Date: Aug 2011
Fan#: 88885
Location: Spring, TX
What I Drive: 2013 SGM Focus SE - 5sp

Posts: 1,546
Points 4,598, Level 43
Points: 4,598, Level: 43 Points: 4,598, Level: 43 Points: 4,598, Level: 43
Level Up 24% Completed
Level up: 24% Level up: 24% Level up: 24%
Forum Activity 25%
Activity: 25% Activity: 25% Activity: 25%
FF Reputation: 2 Slo86GT Good Standing Member
Buy-Sell-Trade Rating: (1)
Soooo if a 5.0L pushrod made 225hp from the factory with 2.25" dual pipes... Why does it gain power moving to a 2.5" system? I daresay that a 2.0L making 160hp from the factory is moving much more air volume than that weezy 2.5L per bank engine.

I honestly don't give much credit to the backpressure theories on modern cars where multiple cats are retained. The cats are a blockage, and force backpressure to be retained for the engine side of things, cancelling out most if not all pulsation in the exhaust flow, and anything post-cat system is made better by open pipes.
2013 Focus SE 5M Daily Driver
2003 Mustang GT V8/Auto Wife's Daily
1986 Mustang GT V8/5M Toy
- Jody -
Slo86GT is offline  
    Reply With Quote