1993-Sierra-Z71
Pontiac & GMT400 Nut
So I decided I'm gonna do long tubes, have it chipped, x pipe, new high flow magnaflow cat.
Also, Since your truck is a '96 with OBD2, a plug in tuner that has perameters for your truck would work fine. Plus you get a few settings to play with, Such as Tow, Economy, Performance on Low octane, and Performance on Higher octane.