t25 manifold-turbo gasket

[ca18det JSN]

Hello, i have a RHD s13 200sx ca18det, uk version, with OEM manifold/ turbo (t25)/ downpipe. What is the easiest way to replace the T25 turbo-manifold gasket? Can i replace it by removing only the manifold or i must remove the turbo anyway? By unscrew some of the turbo's bolts may become loose enough and remove the manifold?