[LLB-M2]

Hi,

i recently changed my stock intercooler and inlet pipe to a VRSF intercooler and MST V2 pipe. Everything fitted well, engine works well-
Now i did a trackday and i having several times a loud houl and drowning sound of the engine while i am on WOT (yes i know valvetronic, no throttle ).
It apears every 30th pull, maybe less, at different places of the track, nothing reproducible.
I feel no power loose, no engine light or warning. ECU and engine is stock (only did IC, cargepipe, boostpipe and inletpipe)

Any ideas? Maybe the diverter valve, now noticable because of the big ic?

best regards Christian