fiestaturbo.com

[james.alexander]

i was thinking of puting a k&n on my fiesta si, but noticed that in the standard air filter there is a hole in the bottom of the casing, this goes down to the exhust manifold i believe. Surely if i remove the standard filter and replace it with a k&n it will connect only to the air flow sensor end and will just leave a hole down to the exhaust manifold. Has anyone got a k&n on an si that could help or does the k&n come with an extra pipe that connects to the bottom of the old filter, also how afective is the k&n filter at improving the car.

[festamunster1]

my boyf put one on my si sunday so i don't know da ins and out but there was a black plastic flexible tube bout 2-3 inches wide that went from underneath the air box, curved round and pointed towards the front to suck in air.hope this helps, soz i can't be more specific!

[festamunster1]

oh yeah and it'l only really make a difference with a full sys exhaust [ERRR] it's sucking in more air so needs to get rid of more gases

[unknown_user]

sept its not that that limits the 1.6si its the 25mm valves.... so ur boy wasted money... part from the noise...

[Project]

Does make a slight difference but not a huuuuge amount.

Decatting the standard exhaust along with an air filter will make it more responsive though, and the exhaust will sound a lot better without being loud, but you'll fail a roadside emissions check.