Now when you say "increase the car performance" - yes it does. Electrical performance. Whether that translates into speed/torque/power I don't know. It really depends on the age of the car, how good is the ground, etc.
Any one can share their turbo exhaust system setting here?
i'm using a 1.3 k3-vet turbo engine.
exhaust setting is
57mm downpipe.
2" flexi host,
2.2"full piping,
2.5" long center bullet(straight)
jasma fujisubo rear...