hi guys i have got a 155 bravo hgt and was just wondering if you can get a stainless manifold for them and have also heard replacing the inlet manifold witha coupe turbo plenum can also see me gains in power can anyone varify this thanks

The coupe inlet is fixed, as the 155 has variable intake (VIS), so I dont think so. More agressive cams from a turbo head?
No idea about manifold, but if you can get them for NA 20v coupe, why not for bravo?

the coupe turbo plenum can only be fitted to the 147 engine, not the 155

as for the manifold, they are hard to find but well worth it, on the 147 engine, but not much difference on the 155 20v unit