Not to be a nutswinger here, but another cool thing about the yellow car is that Jerry hasn't even been going all out for maximum HP with it. For example, he's using a funky dual-length runner intake manifold from a JDM market car (the Cyclone Manifold) designed for better mid-range torque and around-town driving when a sheetmetal intake would probably be worth at least 30hp and maybe as much as 50. He's given up on bigger turbos before because they lost spool and low-end power. The car is full of little things like that, compromises to keep the street fun factor up that take away from absolute straight-line speed.