This is a 5.3L iron block also known as the LM7. Behind it is a 4l80e with a shift kit. It is pretty much a stock engine other than a turbo cam, ARP head studs, and the ring gap has been opened up a little bit.

Turbo kit consists of twin 58mm borg warner T4 turbos on 4-1 304SS manifolds.

Twin turbosmart 44mm wastegates and 50mm turbo smart blow off valve.

80lbs deka injectors tuned with HP tuners.

Step1) Give the turbos a home.