worth it to replace the stock diverter valves
Thank you

 

Depends on your Target Boost pressure and if they are bad or not. They work for what they are designed for. IMHO I would not change them for the sake of it. Just because someone tells you to (and they will). If they are bad it is a different thing. I would not put the stock units back in this case, I would go for Side Vacuum Forge units from Forge themselves or Titan Motorsports. In addition I would also not replace the F Hose with a silicone one either. The stock F hose is good for 30psi and unless it is damaged, petrified or checked, I would clean it up and re-install it. Even if it was bad I would replace it with a stock F hose.

SWR

 

I would think that a GT2 Gemballa already has aftermarket DV's.