1000+rwhp for 20,000 on ebay

i just wonder how that thing spools and how much is left because:

a) those turbos are pretty large for the cubes to have twins… (hence big power for low boost)

…but on the flip-side

b) gt42’s seem to have a big problem with BP, and choking out too soon on LSX engines

not trying to belittle the setup because i obviously makes the power, and is done pretty nice, just curious