AS Performance 2 piece breather system for RS & ST SD Performance when we have received your

when we have received your old ford oil filter housing we can send your new 2 piece AS breather kit

we tested several designs which include a square to tapered manifold which unfortunately didn't work and then our Gen2 design finally got the go ahead after month's of testing

we have Large UK stock for next day delivery RS Owners looking for 500bhp +

This is how the ST should of left the factory

AS Performance 2 piece breather system for RS & ST SD Performance when we have received yourTuning levels on the Focus RS & ST have pushed the standard Ford oil filter housing to its limit, with the fagile diaphragm inside these housings splitting and also leaking due to the clip on design, a upgraded breather system was required, the AS Performance 2 pce breather kit ticks all the boxes and more The AS Performance 2 piece breather kit includes the following 1 x Modified & Baffled Ford oil filter housing, includes new oil filter element and