Ah this video from BigX event. Those people are all well known D1 drivers, off course they are good. Not only Silvias, take a closer look you can see Skyline R32, Skyline R34, Soarer, 180SX...
need advice from all sifu,
my current setup. 1.6 sohc bolt on turbo
td05 14b boosting 1.1bar.planning boosting 1.5bar soon
i just complete custom a water / methanol injection kit to my car,it activate on 0.85...