First spin in coupe this year after fitting a gtech 1 it seems the car shudders more comeing off boost presume I have the original fiat reciculating dv does this mean it needs cleaning or replacing? Dont use the car much as its a weekend car and weather been really bad lately.

i heard that the standard dv on the coupe isnt great at its job!its was the first thing i wanted to replace,mine is a 16vt so i not sure if it would be the same as yours but on the 16s you get a plastic bosh dv i belive

the diaphrame in a standard bosche tends to split under high boost and cause shocking shudders

Its barely worth replacing it with a new OE one, id definately recommend Forge, the spring is designed to cope with higher boost.

Check the Group Buy thread for a deal on the Forge DV006.

If you're very, very quick you can still get in on this.