hi, i have a 2.0 zetec esp focus and was looking at getting a 4.2.1 manifold for it and i see that it decats it. how well would this work on my motor for releasing more power etc as i have read that it doesnt do much on zetec engines but then yet again read that it does. thanks

 

my mates got the same car as u, and he also changed the manifold and decatted it and it made quite a noticable difference as its letting the exhaust gases flow better/faster.
while you at it would be a good idea to change the rest of the exhaust system

 

thanks mate, ill order one after my mot lol yeah ive changed the rest of the exhaust so that should help also.

 

it will help with backpressure and flow etc. to get th ebes tout fo it a remap would help too buddy.

 

i have just fitted a 4-2-1 manifold and it makes a noticable difference. But be warned it will be loud!!

Police dont like loud cars.

 

thanks, yeah i might need get a bigger silencer as its loud at the moment