That is the vapor management system,you 'lost' the carbon canisters.Yes it will affect performance as the 'fumes' are bled into the the intake manifold during 'purge' mode.....plus the fact your gas tank now 'vents' to fresh air.....watch the smokers around your car!!!


V6 MTX
'Don't p**s up my back then tell me it's raining!!!"
'Its only nuts & bolts!'
'If I build it,fix it,upgrade it or modify it...MAYBE they will come....!
Haines Motor Sports Inc,
Dealer for 'Quaife America' & 'Autotech Sport Tuning'
SOLE USA Dealer for the American Axle 'AUSSIE BAR'...
Get a Turbo for you Zetec from HMS Inc...by 'The Demon' ...www.DemonDynamics.co.uk
..don't talk about it DO IT !!!