I'm trying to think how you could run it without running it first into the small to the big turbo, you couldnt run the small turbo off two cylinders and the big turbo off two cylinder cause that will throw out the cylinders, maybe have all four cylinder supplying both turbos and the small one will spool first and the bigger one will take over in the high end. maybe for a 4age, a t28 (small turbo) and gt30 or gt35 (big turbo).