Hi all
So iv just got my self a zafira gsi with the vxr engine and vxr hybrid turbo forged actuator and come filter running at around 250bhp

I have a couple of questions
The car is fitted with a forge recirc valve makeing the flutter but Iíd farther it didnít so was thinking of swapping it out but for what??? Not keen on the really loud dump valves or can I change the springs to Quieten it down a bit
Other things is itís decatted with a 2.5miltec catback
Iíd like to ad a cat for the mot but donít no what to do can I just get a standers exhaust for a vxr/gsi or do I need something else ??i donít want to affect the engine by restricting the exhaust
Thanks all