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-   ZETEC Performance (2000-2004) (http://www.focusfanatics.com/forum/forumdisplay.php?f=39)
-   -   2.5 or 3 inch? (http://www.focusfanatics.com/forum/showthread.php?t=314414)

mattmoz 04-16-2013 12:41 PM

2.5 or 3 inch?
 
are the prefomance gains going to 3 inch over 2.5 alot more or is 2.5 good enough i ask because i might go FI some time ?

sgtsmasher 04-16-2013 02:34 PM

i have a 3" exhaust. i like my exhaust but if you to worry about an exhaust being to loud in your area you will need to invest in a muffler for it. because from personal experience, 3" is loud as fuuuuuuu. and here is a good website to check out for exhausts...mandrelexhaustsystems.com

freemind 04-16-2013 02:37 PM

It depends on you HP goals. 2.5" is your minimal.

Magus2727 04-16-2013 06:43 PM

if going NA you wont see any gains going from 2.5 to 3. if going turbo then go 3" regardless of when you actually get the turbo set up. just get as big of a resonator as possible for the straight section.

mattmoz 04-17-2013 05:39 PM

what about for a sc

macdiesel 04-17-2013 06:15 PM

I thought 2.5" was loud with one muffler, couldn't imagine a 3" exhaust. 2.5 should be fine if you go sc.

Magus2727 04-17-2013 07:51 PM

3" on turbo will help spool times. 2.5 or 2.75" would be fine for SC.

mattmoz 04-19-2013 12:28 PM

where do you get 2.75 at


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