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RICHARD J

18 April 2012 07:37 AM

3 port catch can fitting advice.

Hi all,
Iv bought an OBP 3 port catch can ,but it actualy has 4 ports. I'm after some advice on fitment & some pictures if anyone can help. It's for my 96 STI.
Thanks, Richard.

marcevs72

18 April 2012 07:58 AM

use 2 for the breather outlets on the heads and 1 for the crankcase breather. the 4th one either vent to atmosphere or return to inlet.

RICHARD J

18 April 2012 08:37 AM

OK get the basic idea. Done a search some people say to blanc the PCV valve some say leave it what's best?

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