Reedy, Wat rpm range does it spool up and create full boost by i am looking at putting one on my rb20 soon but i havent been able to find out wat rough area it will spool up by i've got the stock rb25 series 1 turbo on my car at the moment and i dont get full boost untill around 4000rpm lil bit after running 14psi lil bit before running 10psi.. so yer any info on spool of GTRS would be helpful thanks