AS Performance 2 piece breather system for RS & ST SD Performance we tested several designs which

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

Removes original Cat

Still as easy to fit

Airtec intercooler (with or without scoop)

Part No – FDS036-X3

AS Performance 2 piece breather system for RS & ST SD Performance we tested several designs whichTuning 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