Aftermarket RB25DET internal wastegate manifold

[T0nyGTSt]

Is the stock cast one any good?

I wonder if there's any tubular manifolds for internal wastegate turbos or is the stock one fine for say sub 250rwkW purposes?

T.

[KamikazeR33]

the stock one should be fine for 250rwkws, but if u wanna go any higher id definately say change the manifold, as u will be losing power there

the stock one is good for a budget upgrade