675 whp to 750 whp

Description This Performance Package starts with Purple Belt, and adds more fuel system modifications, genuine Pure Stage 2 Plus turbos and ARP head studs.   The CT4-V Blackwing Brown Belt Performance Package delivers 10 to 30 mpg on E65, depending on how aggressive you are. On days when we drive like a sane person, we typically average 20 to 25 mpg in daily city/highway commute.           CT4-V Blackwing Brown Belt Package Dyno Results