What does BPU stand for?
Basic Performance Upgrades. These modifications are: A full length three inch down-pipe (with or with-out high flow cats), 3 (75mm) or bigger cat-back exhaust system, raised boost (18psi), and the required boost cut eliminator (GReddy BCC) needed to achieve that boost without activating the factory fuel cut-off at 14-15psi. These are the modifications that have proven to provide the best HP-to-$$$ ratio.
