formentorvz

Hi all, wondered if anyone could help. Recently installed a Ram air induction kit on my Formentor VZ2. There’s a clunking noise at the end once releasing the throttle (usually as it passes below 2000rpm). I have reinstalled it with no luck. The heat shield isn’t knocking on anything either...

Goodevening, my name is Marco, i live in Livorno, tuscany, i’ve 33 yo and i drive a Formentor vz 310hp