Not sure why, but installed the UMW BOV's today together with the Europipe exhaust. Peak Boost is now 1.0 bar. No longer seeing spikes above 1.0 bar. Very happy with the Europipe, fitted very well. Sounds great! Also fitted the X73 Suspension including the solid motor mounts. Was expecting car to be lower by 20mm, however end result is 5mm lower front & rear. Car drives very firm, not uncomfortable, but firm. Final fitting was the OEM short shifter & CF shifter / H'Brake. Car is now much easier to drive.
[IMG][/IMG]

 

The high spikes occur with the factory bypass valves when one shifts. The turbochargers are spooling and when the throttle-body slams shut you will see the spike..

When you install the Forge valves with the correct spring and shims. The spike is gone and you can see your sustained boost.

Nice job on the install!!