AIRTEC STAGE 3 INTERCOOLER UPGRADE FOR MK2 FOCUS ST RS-SPEC HOSES 0.75" Tweeter so it only opens as

so it only opens as much as required to get the job done (the factory valve simply opens and shuts

Ducati - 749

PRK-147-BK

The port wraps around two walls of the enclosure to produce the necessary low tuning frequency that ensures excellent extension and response smoothness

AIRTEC STAGE 3 INTERCOOLER UPGRADE FOR MK2 FOCUS ST RS-SPEC HOSES 0.75" Tweeter so it only opens asAs part of our expanding Focus RS product range, AIRTEC Motorsport is proud to launch our Stage 3 intercooler upgrade suitable for track or fast road use. In order to ensure there is no noticeable loss in performance during extended periods of hard driving, we have taken our hugely popular Stage 1 Focus RS intercooler and modified it to fit within the ST bumper and added our 2. 5 Pro Hoses(intercooler to inlet manifold connector and Pro Hoses