Good quality item. Got a mechanic to fit it at the same time as the intercooler. A bit fiddly but made easier by having it off the ground on a ramp so only a 20 minute job. It seems to have got rid of the strange faint whistling sounds that I previously got from the old valve coming on and off very low boost. Fitted in preparation for the MP275 remap as already have the exhaust and induction kit fitted.
Great quality upgrade that was easy to fit in around 30 mins. Futureproof upgrade before my first tune on my Focus ST mk3.5.
If you are going to up your ST power from stock then up grading this valve is a must. The standard recirculating valve isn’t up to the job and can fail,leading to turbo damage. This Mountune valve is league’s ahead, extremely well engineered from high grade aluminium. Since fitting the valve I have noticed improved throttle response,smoother power delivery and better boost noises. I would recommend this valve to any ST owner,5 stars.