Exhaust leak, loosing boost

[RedArrow]

The car doesnt have power as it did before.

Rpm builds until circa 3000 (higher gears) but then it feels topped. I can rev in 2nd or 3rd tillabout 4000 but it doesnt rev too quickly.
It isnt filter or fuel delivery or pump issue.

In 5thgear (m46) at about 65-70mph my top rpm is 3000. Idk why.

Something important i noticed: turbo spools way too early compared to how it worked before. And it spools to fast too soon

The intake and exh man9folds were off, resealed w new gaskets etc.

I suspect the gasket where the exhaust pipe mounts to the engine (at turbo)
I can see a tiny blowout spot where the mating surfaces shpuld be sealed by thatgasket.

Anyone have or can get that gasket? For d24t.

Also what is the suggested timing with the so called "bigger" gtd nozzles? I feel like the car needs more juicebut idontwant toplay w the inj pump (yet).

Can that exh leak cause this rpm sympthom? ?
Id like to get that gasket (more than one if avail)

Thx for reading
Otherwise car runs like a champ, just had a 400mile PA trip but "limited' rpm and "reduced "power really suck.