-Engines and engine parts
-Drivetrains/Transmissions
-Exhaust
-Induction
-Electricals/electronics
-Gauges
-Engine managements
-All other performance upgrades for the engine
anyone did or know how to do this diy? it will beep like charming sound hehe like initial d anime....my idea is that maybe we can tap the speed signal wire frm ecu and somehow trace the voltage at 100km/h...