Ford Focus Forum, Ford Focus ST Forum - View Single Post - Basic Bolt ons: Exhaust Headers/Flex Pipes
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Old 04-01-2009, 04:15 PM   #9
warneej
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What I Drive: 04 ZX3 D23E-10SES Sedan-12 Ti Hatch

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Quote:
Originally Posted by captcurt_18 View Post
Which is better for the D20 and the D23? I know one of them has bigger primaries which makes it more optimal for the D23, but i forget which one.
The general consensus is that the F2's smaller primaries work better on the D20 and the rest's larger primaries work better on the D23. I don't know how much proof of this there is beyond theory however.

Quote:
Originally Posted by focusedin View Post
The exhaust that was given to me was a gift but it was only a 2.25 and most headers have a 2.5 collector. Problem??
No.
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