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Im wanting to do a svt header swap on my zx3 but was wondering if u can only use certain cat backs or if it fixs zx3 im ok. Mainly looking at the obx type r. I knida like the look and like the sound it produces.
 

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C2H5OH
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Most 'cat backs' are actually a flexpipe back on the Focus.
From the flexpipe back the SVT is the same as the ZX3.
It's from the header to the flexpipe where the differences are. If using a SVT header you'll need a SVT cat/offroad pipe and SVT flexpipe. If using a Zetec header you need a zetec flexpipe only (is no room for a cat).


So,


SVT header



+




Zetec

 

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I have the OBX r in my car..



If I had to go back, id double up the gaskets going into the head. the headers goes down low enough that the flex pipe connects right to the headers.
 

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BTW, the EGR fitting for the OBX-R Header was a pain in the ass to find, and you will only find it in Brass. Which is holding up well.. I bought a Mandreal 2.5" Flexpipe, and I have a 2.5" exhaust that dumps after the rear axle. My car is stupid loud though, I need to add a muffler. I am catless.
 
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