As far as I know, the stock pump can max out at 90cc, maybe 100. I dont know what Stage 2 entails but stock fueling is somewhere around 60-65cc. So you're looking at 270ish hp max? The stock turbo will barely he able to make enough air (air! Not boost) to produce that power. You also have a tiny tiny turbine housing. So going to an HX35 will give you more top end due to more air and a huge increase in your ability to flow air OUT of the engine. The tradeoff will be later spool. Compared to the stock turbo it will be significant, but not necessarily undriveable. It all depends on what you want from the car. EGTs should not increase. If you push the stock turbo beyond its limits the heated air will of course result in higher EGTs

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Dan
2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
Past: 1987 300D - 264k