What MAF & KKK Turbo options for 400-450 HP?

[Jonas_R]

There is no 8 hotside available for the RS2 K24/7200. At least not from KKK originally.

Still not necessary,limitting thing is compressor side. RS2 turbo hotside is good for up to 420 hp when combined with the right compressor side. All from KKK directly, no other parts needed.

K26/27 or K26/27/29 won´t give you advantage in this power range, just more lag.

What parts would that be?

[Quattronaut]

I especially mean the compressor wheels. You don't have to take billett wheels from other manufacturers or brands like iroz, or "I-don't-know-what-they're-all-driving", that promise hundreds of hp. There are 2 origin KKK wheels that fit real good: One is the 2871 O- wheel, that is very easy to fit into the original housing. So you got a complete stock-looking RS2-charger, that can do up to 2,3 without problems, for 600 nm & 400 hp without stuff like water injection or something else.
The other one is the 2877 X wheel, wich has same geometry, but a slightly bigger inlet diameter for more power at upper rpm. With this one there are around 420 hp possible, with stock hotside. But afaik this one needs a little bigger comp housing (for example from normal K26/27), what makes the thing a bit more expensive.
Both wheels are KKK parts, proven and tested millions of times and therefore reliable as known.